CLOSE
Original image
amazon / istock

Get This Weekend's Best Amazon Deals Now

Original image
amazon / istock

As a recurring feature, our team combs the Web and shares some amazing Amazon deals we’ve turned up. Here’s what caught our eye today, April 15.

Mental Floss has affiliate relationships with certain retailers, including Amazon, and may receive a small percentage of any sale. But we only get commission on items you buy and don’t return, so we’re only happy if you’re happy. Good luck deal hunting!

GADGETS, TOYS, AND MEDIA

Jackery Bolt 6,000 mAh Ultra-Compact External Battery Charger, Portable Power Bank and Travel Charger with Built-in Apple MFI Certified Lightning and Micro USB Cables (Black) for $23.99 (list price $69.99)

Energizer 2032BP-4 3 Volt Lithium Coin Battery - Retail Packaging (Pack of 4) for $4.22 (list price $6.49)

Sennheiser HD 202 II Professional Headphones (Black) for $24.74 (list price $26.40)

Zippo Pocket Lighter, Black Matte for $13.15 (list price $19.95)

Jackery Mini Premium 3350mAh Portable Charger - External Battery Pack, Power Bank, & Portable iPhone Charger for Apple iPhone SE, Apple iPhone 6s, 6s Plus, 6, 5, iPad Pro, iPad Mini, Samsung Galaxy S7, Samsung Galaxy S6, and S5 (Silver) for $12.74 (list price $29.99)

Oria Combination Lock, 4 Digit Combination Padlock for School, Employee, Gym & Sports Locker, Case, Toolbox, Fence, Hasp Cabinet & Storage - Silver and 2 Pack for $12.99 (list price $34.99)

Vtin 20 Watt Waterproof Bluetooth Speaker, 25 Hours Playtime Portable Outdoor Bluetooth Speaker, Wireless Speaker for iPhone, Pool, Beach, Golf, Home for $39.99 (list price $99.99)

Huntkey 2-Outlet Wall Mount Cradle with Dual 2.1 AMP USB Charging Ports, SMD407, White for $9.99 (list price $19.99)

Anker PowerCore 15600 Portable Charger with 4.8A Output, PowerIQ and VoltageBoost Technology (Black) for $26.99 (list price $49.99)

Wireless Bluetooth Speaker- BLKBOX POP360 Hands Free Bluetooth Speaker - for iPhones, iPads, Androids, Samsung and all Phones, Tablets, Computers (Wicked White) for $24.99 (list price $49.00)

Tonor USB Professional Condenser Sound Podcast Studio Microphone for PC Laptop Computer Apple Mac Upgraded Version - Plug and play, Black for $13.59 (list price $39.99)

iXCC 50W 10A 5 USB Multi Ports Cup Holder Fast Car Charger for iPhone 7 6 6s Plus, iPad Air Pro mini, Samsung Galaxy S7 S6 Edge Note or More for $15.99 (list price $39.99)

VicTsing FM Transmitter, Bluetooth FM Transmitter Radio Adapter Car Kit With 5V 2.1A USB Car Charger MP3 Player Support TF Card USB Flash Drive for $19.99 (list price $49.99)

TaoTronics Active Noise Cancelling Headphones, Wired Earphones In Ear Corded Earbuds with 15 Hours Playtime and Built-in Microphone (Noise Reduction, Aluminum Alloy Construction, Gold-plated Jack) for $37.99 (list price $45.99)

Spigen Liquid Air Armor iPhone 7 Case with Durable Flex and Easy Grip Design for IPhone 7 2016 - Black for $9.99 (list price $17.99)

EGRD Upgrade Version Bluetooth V4.1 Wireless Stereo Bluetooth Earphones with CVC6.0 Noise Cancellation, Built-in High Sensitivity HD Micro.(White) for $22.88 (list price $69.99)

Car Mount, (2 Pack) Mengo Magna-Snap Mini Magnetic Air Vent Car Mount for Smartphones (iPhone, Samsung, HTC, LG, Nokia, & More), Mp3 Players, and GPS Devices - Retail Packaging for $11.97 (list price $29.99)

Bluetooth Speakers Zhicity Wireless Stereo Subwoofer Smart Touch Lamp Speaker Color Changing for $26.99 (list price $54.99)

Pure Enrichment PurePulse Pro TENS Unit Muscle Stimulator for $39.99 (list price $64.99)

Doberman Security SE-0106-4PK Ultra-Slim Window Alarm (4 Pack) for $24.89 (list price $29.99)

Apple Pencil Stand, TechMatte Apple Pencil Charging Dock/Stand (Aluminum) with Built-in Charging Cable (5FT) for $17.84 (list price $49.99)

Photive BTH3 Over-The-Ear Wireless Bluetooth Headphones with Built-in Mic and 12 Hour Battery. Includes Hard Travel Case. for $39.95 (list price $99.95)

iPazzPort Wireless Mini Handheld Keyboard with Touchpad Mouse Combo for Android TV Box and Raspberry Pi 3 and HTPC and XBMC KP-810-19S - Black for $11.99 (list price $14.99)

TomTom VIA 1535TM 5-Inch Bluetooth GPS Navigator with Lifetime Traffic & Maps and Voice Recognition for $99.99 (list price $119.99)

ViewTV AT-163 ATSC Digital TV Converter Box and Media Player for $23.99 (list price $64.99)

Fidget Toy,AusKit 10 Colors (Package of 10)Sensory Fidgets Help with Autism, ADHD, ADD, OCD and Anxiety for Children and Adults for $7.99 (list price $16.99)

Exploding Kittens: A Card Game About Kittens and Explosions and Sometimes Goats for $16.99 (list price $24.99)

LEGO Architecture 21024 Louvre Building Kit for $48.49 (list price $59.99)

Scientific Explorer Magic Science Kit for Wizards Only for $13.99 (list price $23.99)

Wonder Workshop Dash Robot for $119.99 (list price $149.99)

Playhut Thomas the Train Play Vehicle for $25.45 (list price $39.99)

Nickelodeon Kids' PAW4016 Paw Patrol Digital Display Quartz Multi-Color Watch for $8.99 (list price $9.99)

Invicta Men's 15205 Pro Diver Chronograph Blue Dial Stainless Steel Watch for $59.99 (list price $95.99)

KITCHEN

Rubbermaid 17.3 Cup FreshWorks Produce Saver Food Storage Container, Large, Green for $10.22 (list price $16.99)

Rubbermaid Antimicrobial Drain Board Large, White for $13.88 (list price $17.06)

Squooshi Reusable Food Pouch | Animal 6 Pack | New Larger Size! for $12.49 (list price $29.99)

Estilo Stainless Steel Lazy Susan - 2 Tier Design, 360-degree Turntable for $11.04 (list price $12.99)

Chef's Choice 15 Trizor XV EdgeSelect Electric Knife Sharpener for $123.98 (list price $210.00)

DRAGONN Premium Sturdy 12-inch and 9-inch Stainless-steel Locking Kitchen Tongs, Set of 2 … for $12.95 (list price $19.99)

Kootek 11 Inch Rotating Cake Turntable with 12.7'' Angled Icing Spatula, Revolving Cake Stand White Cake Decorating Supplies for $12.99 (list price $16.99)

Secura Stainless Steel Electric Wine Bottle Opener with Foil Cutter (Stainless Steel) for $22.90 (list price $59.99)

Caribou Coffee Single-Serve K-Cup Pod, Caribou Blend Medium Roast Coffee, 72 Count (6 Boxes of 12 Pods) for $33.79 (list price $53.97)

Neoflam Poly Cutting Board with Microban Antimicrobial Protection, Green, 17x12 Inch for $11.46 (list price $14.99)

Aicok Oven Gloves Non-Slip Kitchen Oven Mitts Heat Resistant Cooking Gloves for Cooking, Baking, Barbecue Potholder, Red, 1 Pair for $7.14 (list price $19.59)

Estilo Bamboo Tea Storage Box, 10 Equally Divided Compartments for $14.45 (list price $30.46)

Greenco Bamboo Lazy Susan Turntable 14 Inch Diameter for $9.34 (list price $10.99)

Cooks Standard 02421 8-Inch Nonstick Stainless Steel Hard Anodize Egg Poacher with Glass Lid, 4 Cup for $33.03 (list price $49.99)

Estilo 1 gallon Glass Mason Jar Double Beverage Drink Dispenser On Metal Stand With Leak Free Spigot, Clear for $24.04 (list price $29.99)

DRAGONN Stainless Steel Whisks, Silicone handle, Milk & Egg Beater Blender, Kitchen Utensils for Blending, Set of 3 for $9.99 (list price $14.95)

Greenco Counter Top Bamboo Paper Towel Holder for $8.49 (list price $9.99)

Habor Digital Meat Thermometer 5 Second Instant Read Swiveling Head Cooking Thermometer for Grill for $8.99 (list price $18.99)

Chefman RJ24-V2-Red Modern Stylish Design Electric Countertop Egg Cooker with Removable Tray, Red for $16.00 (list price $29.99)

Farberware 6-Piece Stick-Resistant Cutlery Set for $10.35 (list price $16.95)

FoodWorks Silicone Ice Pop Maker Molds/Popsicle Molds, Set of 6 for $11.95 (list price $29.95)

Bellemain Stainless Steel 3 Cup Flour Sifter for $10.50 (list price $27.95)

DRAGONN Zester Grater Sharp Stainless Steel Blade with Black Handle, Safety Cover and Rubber Footings for $9.95 (list price $19.95)

Norpro Stainless Steel Funnels, Set of 3 for $8.37 (list price $9.50)

Bodum Bistro 2-Piece Double Wall Mug, 10-Ounce, Clear for $23.49 (list price $43.50)

Hamilton Beach Deep Fryer with Cool Touch, 2-Liter Oil Capacity (35021) for $27.89 (list price $49.99)

Nutri Ninja Auto iQ (BL482) for $86.10 (list price $99.99)

Culinary Butane Torch – Professional Quality for Home Chefs – Create a Flawless Crème Brulee by Culinary Prestige for $19.97 (list price $44.99)

Vidalia Chopper Pro Vegetable Chopper by Müeller - Strongest - NO MORE TEARS 30% Heavier Duty Multi Vegetable-Fruit-Cheese-Onion Chopper-Dicer-Kitchen Cutter for $19.99 (list price $39.97)

Kitchen Shears, Stainless Steel, Black, 9-inch for $2.09 (list price $3.69)

Cheese Board Set by Great Beyond Creations: Complete Kit of Slate and Bamboo Board, 4 Knives, 6 Ceramic Markers, Gold Pen, and Chalk in a Gift Box for $39.99 (list price $99.99)

Vremi Wine Preserver - Wine Pump with 4 Wine Vacuum Stoppers - Wine Saver Vacuum Pump and Rubber Wine Stopper Set with Date Markers to Remove Air and Vacuum Seal Open Wine Bottle for 7-10 Days for $9.99 (list price $29.99)

Oster TSSTTRWF4S 4-Slice Toaster for $29.49 (list price $39.99)

HOME

Bounty Select-a-Size Paper Towels, White, Huge Roll, 12 Count for $23.99 (list price $28.99)

O-Cedar EasyWring Microfiber Spin Mop and Bucket Floor Cleaning System for $33.88 (list price $44.99)

Hoover Linx BH50010 Cordless Stick Vacuum Cleaner, for $96.99 (list price $199.99)

Cottonelle FreshCare Flushable Cleansing Cloths, 336 Wipes for $8.66 (list price $14.99)

InnoGear USB Car Essential Oil Diffuser Air Refresher Ultrasonic Aromatherapy Diffusers with 7 Colorful LED lights for Office Travel Home Vehicle for $21.99 (list price $49.99)

Greenco Rectangle Bamboo Butler Serving Tray With Handles for $11.47 (list price $14.99)

Granite Gold GG0036 Granite Gold 24-oz. Sealer, Preserver & Protectant for $16.80 (list price $24.99)

Granite Gold Shower Cleaner for $6.79 (list price $7.90)

Granite Gold All-Surface Wipes for $6.89 (list price $9.45)

Pure Enrichment PureSteam Fabric Steamer - White for $21.99 (list price $34.99)

Ettore 48221 Cobweb Brush with Click-Lock Feature for $7.98 (list price $11.32)

Balichun Luxury Fleece Blanket Super Soft Warm Lightweight Bed or Couch Blanket (Queen,Dark Grey) for $32.90 (list price $125.00)

Jonathan Adler Pop Candle, Champagne for $34.99 (list price $42.00)

Premium Velvet Suit Hangers - 50 Pack - Heavy Duty - Non Slip - Velvet Suit Hangers Black - by Utopia Home for $20.99 (list price $39.99)

URPOWER Essential Oil Diffuser, 200ml Wood Grain Aromatherapy Diffuser Ultrasonic Cool Mist Aroma Humidifier with Adjustable Mist Mode, Waterless Auto Shut-Off, 7 Color LED Lights & 4 Timer Settings for $27.99 (list price $79.99)

Hoover Platinum Collection Professional Strength Pet Plus Carpet & Upholstery Detergent 50oz, AH30575 for $15.99 (list price $19.99)

Levoit Cora Himalayan Salt Lamp Natural Glow Pink Sea Crystal Rock (Portable Design), 2 pounds,Touch Brightness Dimmable Control, Levoit Basin Design, UL-Listed Cord, 3 X 2.5watt Bulbs and Gift Box for $24.99 (list price $39.99)

Large Indoor/Outdoor Decorative Silver Wall Clock - Universal Non - Ticking & Silent 12-Inch Wall Clock - by Utopia Home (Aluminium) for $12.74 (list price $39.99)

All Liquid Laundry Detergent, Free Clear, 46.5 Ounce (Pack of 2) for $18.14 (list price $20.10)

Flameless LED Tea Light Candles, Realistic, Battery Powered, Unscented LED Candles, Fake Candles, Tealights (24 Pack) - Vont for $9.00 (list price $9.77)

Arm & Hammer Bioenzyme Power Laundry Detergent Packs, 48 Count for $13.33 (list price $16.99)

Winix 5300-2 Air Purifier with True HEPA, PlasmaWave and Odor Reducing Carbon Filter for $135.99 (list price $199.99)

Bounce Outdoor Fresh Dryer Sheets and Fabric Softener, 240 Count for $8.96 (list price $12.56)

Large Beach Towel, Pool Towel, in Cabana Stripe - (Variety, 4 pack, 30x60 inches) - Cotton - by Utopia Towel for $29.74 (list price $59.99)

Quilted Fitted Mattress Pad (Twin) - Mattress Cover Stretches up to 16 Inches Deep - Mattress Topper by Utopia Bedding for $17.84 (list price $35.99)

HEALTH AND BEAUTY

Panasonic Hair and Beard Trimmer, Men's, with 39 Adjustable Trim Settings and Two Comb Attachments for Beard and Hair, Corded or Cordless Operation, ER-GB60-K for $58.69 (list price $70.20)

CeraVe Moisturizers, Moisturizing Cream, 16 Ounce for $15.49

Gillette Venus Embrace Women's Razor Blade Refills, 4 Count for $15.31 (list price $20.49)

SHILLS Purifying Blackhead removing Peel-off Mask, Charcoal Facial Deep Cleanser, Acne Face Mask (Single) for $15.99 (list price $22.99)

AXE Antiperspirant Stick for Men, Phoenix 2.7 oz, Twin Pack for $6.99 (list price $7.99)

North Coast Organics All Natural Deodorant: Death by Lavender 2.5oz - Aluminum, Paraben, Sulfate, Cruelty, and GMO FREE for $8.95 (list price $9.99)

NIVEA Men Sensitive Post Shave Balm 3.3 Fluid Ounce (Pack of 3) for $14.61 (list price $16.77)

Olay Complete Daily Defense All Day Moisturizer With Sunscreen SPF30 Sensitive Skin, 2.5 fl. Oz., (Pack of 2) for $22.38 (list price $25.98)

Colgate Peroxyl Mouth Sore Rinse, Mild Mint, 16.9 Fluid Ounce for $8.99 (list price $10.49)

Gillette Venus Women's Razor Blade Refills, Swirl, 4 Count for $20.99 (list price $21.99)

Speed Stick Power Antiperspirant/Deodorant, Fresh Scent, 3 Ounce (Pack of 6) for $12.48 (list price $13.74)

Pantene Pro-V Smooth & Sleek 2in1 Shampoo and Conditioner, 25.4 FL OZ (Pack of 3) for $28.03 

Simply Straight Ceramic Hair Straightening Brush, Black/Pink for $28.69 (list price $39.99)

Revlon One Step Dryer & Styler for $41.99 (list price $49.99)

TruSkin Naturals Vitamin C Serum for Face, Organic Anti-Aging Topical Facial Serum with Hyaluronic Acid, 1 fl oz for $19.99 (list price $39.99)

Black Peel Off Mask LuckyFine Blackhead Removal Facial Deep Cleansing Purifying Whitening Mud Mask/Face Cleaning Mask Black 60g for $14.99 (list price $29.98)

AFY AIVOYE Suction Black Mask Deep Cleansing Face Mask Tearing Resist Oily Skin Strawberry Nose Black Mud Face mask (pack of 1 boxes) for $8.49 (list price $14.99)

EmaxDesign 20 Pieces Makeup Brush Set Professional Face Eye Shadow Eyeliner Foundation Blush Lip Makeup Brushes Powder Liquid Cream Cosmetics Blending Brush Tool for $7.99 (list price $29.99)

Natrol Biotin Maximum Strength tablets, 10,000mcg , 100 count, (pack of 2) for $12.51 (list price $24.15)

Doctor's Best High Absorption Coq10 w/ BioPerine (100 mg), 120 Soft gels for $13.55 (list price $14.60)

O'Keeffe's Working Hands & Healthy Feet Combination Pack of Jars for $9.99 (list price $11.47)

PURELL Hand Sanitizing Wipes - Clean Refreshing Scent - 20 Count Travel Pack (Box of 6) for $12.09 (list price $21.19)

Waterpik Aquarius Water Flosser, WP-660 for $59.99 (list price $79.99)

Aquaphor Advanced Therapy Healing Ointment Skin Protectant 14 Ounce Jar for $14.26 (list price $16.89)

OFFICE, SCHOOL, AND CRAFTS

Brother PTD400AD Label Maker With AC Adapter for $43.99 (list price $59.99)

Brother QL-700 High-speed, Professional Label Printer for $59.99 (list price $76.98)

Square Credit Card Reader for iPhone, iPad and Android for $6.95 (list price $9.99)

Square Dock for Reader, A-SKU-0120 for $28.30 (list price $29.99)

Dust-Off Disposable Compressed Gas Duster, 10 oz Cans, 2 Pack for $12.44 (list price $13.59)

Scotch TL901C-T Thermal Laminator, 2 Roller System, Fast Warm-up, Quick Laminating Speed (White) for $19.97 (list price $29.99)

Iwako Japanese Puzzle Take Apart Erasers Zoo Animals Set of 7 for $5.99 (list price $7.99)

International Arrivals is now newly OOLY, Creatibles DIY Erasers, Set of 12 (161-001) for $11.14 (list price $11.95)

BIC Wite-Out Brand EZ Correct Correction Tape, 10-Count for $15.00 (list price $16.53)

Tombow Mono Original Correction Tape, 10-Pack for $15.01 (list price $18.60)

ArtBin Essentials Storage Box with Handle- 12 by 12-Inch Art Craft Storage Container, Clear, 6913AB for $7.19 (list price $10.99)

Cross Star Wars, Darth Vader Click Gel Ink Pen & Jot Zone Journal (AT0625SD-17/1) for $45.42 (list price $75.00)

Ling's moment 10 Feet Vintage Style Pennant Banner, Paper Triangle Flags Bunting for Wedding, Baby Shower, Event & Party Supplies, 15pcs Flags(Pink+White+Gold Glitter) for $7.99 (list price $14.99)

12" Gold Confetti Balloons, 6ct for $2.00 (list price $7.99)

Artists Loft Fundamentals Watercolor Pan Set, 36 Colors for $8.29 (list price $12.50)

Cedar Markers Liquid Chalk Markers - 12 Pack With Free 40 Chalkboard Labels - Amazing Neon Color Pens Including Gold And Silver Ink. Reversible Bullet And Chisel Tip And A Brand New Revolutionary Cap. for $15.99 (list price $35.99)

SUDEE STILE Colored Pencils 150 Unique Colors (No Duplicates) Art Drawing Colored Pencils Set with Case Sharpener for $127.96 (list price $127.96)

Lineon 50 Colors Gel Pens,Gel Pen Set for Adult Coloring Books Art Markers for $10.99 (list price $49.99)

Duck Brand Bubble Wrap Original Cushioning, 12-Inches x 150-Feet, Single Roll (284054) for $18.35 (list price $20.99)

Smead Hanging File Folders, 1/5-Cut Tab, Letter Size, 25 Per Box, Assorted Primary Colors (64059) for $8.79 (list price $11.69)

Stabilo Pens Item 8830-1 Point 88-Fine Point-30 Color Wallet of Coloring Pens/Fineline Markers-Includes 30 Unique Colors for $16.61 (list price $28.50)

The Pencil Grip Neon, Universal Ergonomic Training Gripper for Righties and Lefties, 6 Count Assorted Colors (TPG-11306) for $7.06 (list price $10.68)

Art Wall 2506-126 100-Piece Tissue Paper, 20 x 26-Inch, Assorted Colors for $6.25 (list price $9.99)

Alumilite Amazing Casting Resin, 16-Ounce for $13.57 (list price $15.00)

OUTDOORS, GARDEN, AND SPORTS

Mava Sports Elbow Sleeve Recovery Compression – Support for Workouts, Weightlifting, Arthritis, Tendonitis, Tennis and Golfer's Elbow – Bamboo Charcoal Fiber Athletic Elbow Compression Sleeves for $14.95 (list price $28.99)

RIVBOS RBK002 Rubber Flexible Kids Polarized Sunglasses for Baby and Children Age 3-10 (Mirrored Lens Available)(3376-pink) for $9.98 (list price $19.98)

Mava Sports Knee Wraps (Pair) for Cross Training WODs,Gym Workout,Weightlifting,Fitness & Powerlifting - Knee Straps for Squats - For Men & Women- 72"-Compression & Elastic Support for $24.95 (list price $35.99)

GoPets Dematting Comb with 2 Sided Professional Grooming Rake for Cats & Dogs for $21.00 (list price $39.99)

Skywalker Trampolines Rectangle Trampoline and Enclosure with Green Spring Pad, 8 X 14-Feet for $404.10 (list price $549.00)

Kootek Tactical Flashlight Knife K1 Multifunctional Self Defense Survival Knife with LED Rechargeable Adjustable Torch Emergency Light for Vehicle Camping Outdoor for $15.99 (list price $24.98)

CAP Barbell Cast Iron Competition Weight Kettlebell, 13-Pound, Black/Gray for $20.99 (list price $24.21)

Premium Cat Scratcher by GoPets, Wedge Shaped Corrugated Cardboard is Reversible Lasts 2x Longer Includes 1 Pack Catnip, Natural Incline More Ergonomic Than Scratching Post, Cutouts to Hide Toys for $17.00 (list price $45.99)

J.L. Childress Gate Check Bag For Standard and Double Strollers, Red for $12.95 (list price $17.99)

SHINE HAI 50ft Expanding Hose with 8 Functions Sprayer, Expandable Garden Hose with Strongest TPS, Solid Brass Connector Fitting, Extra Strength Fabric Garden Hose Nozzle for $34.99 (list price $99.99)

GDEALER 4 Pack Fairy Lights Fairy String Lights Battery Operated Waterproof 8 Modes 50 LED 16.4ft String Lights Copper Wire Firefly Lights Remote Control for DIY Wedding Party Dinner (Warm White) for $19.99 (list price $36.99)

I Go 89-Piece First Aid Kit, Red for $10.19 (list price $19.99)

G4Free Outdoor Tactical Backpack,Military Sport Pack Shoulder Backpack for Camping, Hiking, Trekking,Rover Sling Pack Chest Pack(Black) for $19.99 (list price $14.99)

ELECTRONICS

ANNKE 8-Channel HD-TVI 1080P Lite Video Security System DVR and (4) 1.0MP Indoor/Outdoor Weatherproof Cameras with IR Night Vision LEDs- NO HDD for $129.99 (list price $299.99)

AUKEY Dash Cam, Full HD 1080P, 170° Wide Angle Lens, Night Vision, Car Dashboard Camera for $69.99 (list price $104.99)

Mackie CR Series CR3 - 3" Creative Reference Multimedia Monitors (Pair) for $79.99 (list price $99.00)

ViewTV Flat HD Digital Indoor TV Antenna - 25 Miles Range - Black for $5.79 (list price $27.99)

VERKB Wireless Microphone Karaoke Pro, 3-in-1 2200mAh Bluetooth Aluminium Alloy Karaoke Machine KTV for Apple iPhone Android Smartphone or Pc(Light Golden) for $37.99 (list price $118.99)

Logitech MX Master Wireless Mouse, Large Mouse, Computer Wireless Mouse, Stone (910-004956) for $69.99 (list price $99.99)

VicTsing VGA To HDMI Output 1080P HD Audio TV AV HDTV Video Cable Converter Adapter for $14.99 (list price $19.99)

CyberPower CP1500AVRLCD Intelligent LCD Series UPS 1500VA 900W AVR Mini-Tower -New Design and More Features for $129.95 (list price $140.65)

Belkin BSV300ttCW 3-Outlet Wall Mount Cradle Surge Protector with Dual USB Charging Ports (2.4 Amp Total) for $21.48 (list price $29.99)

WD 4TB Black USB 3.0 My Passport Portable External Hard Drive (WDBYFT0040BBK-WESN) for $112.79 (list price $159.99)

BOSS Audio BV9364B Double Din, Touchscreen, Bluetooth, DVD/CD/MP3/USB/SD AM/FM Car Stereo, 6.2 Inch Digital LCD Monitor, Wireless Remote for $80.77 (list price $119.99)

Fusion5 7" Quad Core 774 IPS Google Android Lollipop 5.1 Tablet PC, 1280800 1GB RAM, 8GB with IPS Display, Dual Camera and Google Play Kids Tablet PC for $44.97 (list price $89.69)

SanDisk iXpand Flash Drive 32GB for iPhone and iPad, Black/Silver, (SDIX30C-032G-GN6NN) for $35.98 (list price $59.99)

Acer Aspire VX 15 Gaming Laptop, 7th Gen Intel Core i7, NVIDIA GeForce GTX 1050 Ti, 15.6 Full HD, 16GB DDR4, 256GB SSD, VX5-591G-75RM for $999.99 (list price $1,049.99)

Tripp Lite 7 Outlet (6 Right Angle + 1 Transformer Outlet) Surge Protector Power Strip 4ft Cord & $25K INSURANCE (TLP74RB) for $9.76 (list price $11.63)

TOOLS

TP-Link Smart LED Light Bulb, Wi-Fi, Dimmable White, 50W Equivalent, Works w/ Amazon Alexa, 1-Pack (LB100) for $19.99 (list price $34.99)

TEKTON 13501 1/4-Inch and 3/8-Inch Drive Socket Set, Inch/Metric, 6-Point, 3/16-Inch - 3/4-Inch, 5 mm - 19 mm, 45-Piece for $40.49 (list price $44.99)

Cymas UV Flashlight, 12 LED Ultra Violet Blacklight Urine and Scorpion Detector Torch to Find Stains on Carpet for $6.99 (list price $15.99)

OMorc Soldering Iron with ON/OFF Switch 60W 110V Electric Soldering Iron Kit, Adjustable Temperature, 5pcs Different Tips, Stand, Solder Wire for $16.99 (list price $39.99)

InnoGear 5000 Lumens Max Bright Headlight Headlamp Flashlight Torch LED with Rechargeable Batteries and Wall Charger for Hiking Camping Riding Fishing Hunting for $24.99 (list price $59.99)

Makita XT324 18V LXT Lithium-Ion Cordless 3-Pc. Combo Kit for $209.58 (list price $245.58)

Cartman 1" x 12' Lashing Straps up to 600lbs, 6pk in Carry Bag for $11.99 (list price $19.99)

Chamberlain WD962KEV Garage Door Opener, ¾ HPS, Battery Backup When Power Goes Out, Ultra-Quiet Belt Drive Operation, MyQ Smartphone Control Enabled (Internet Gateway Sold Separately), Includes 2-3 Button Remotes, Keyless Entry Keypad, Multi-Function Wall Control Panel for $201.99 (list price $251.99)

Suaoki Led Camping Lantern Lights Rechargeable Battery (Powered By Solar Panel and USB Charging) Collapsible Mini Flashlight for $16.99 (list price $25.99)

Albrillo LED Under Cabinet Lighting Dimmable Warm White, 12W 900 Lumens, 3 Pack for $29.99 (list price $59.99)

Gorilla Epoxy, .85 oz., Clear for $3.87 (list price $5.47)

Gator Grip Universal Socket Set - ETC-200 for $15.99 (list price $21.99)

Stanley 85-753 22 Piece Long Arm SAE & Metric Hex Key Set for $8.99 (list price $14.99)

Gorilla Wood Glue, 18 oz. for $3.97 (list price $5.97)

TR Industrial TR88302 Multi-Purpose Cable Ties (100 Piece), 8", Black for $5.99 (list price $9.99)

Cartman Microfiber Cleaning Cloth 5 Colors, 14" X 14" 50Pk for $15.99 (list price $19.99)

TEKTON 3352 Pry Bar Set, 4-Piece for $19.62 (list price $24.99)

Original image
iStock // Ekaterina Minaeva
technology
arrow
Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
Original image
iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

Original image
Library of Congress
war
arrow
10 Facts About the Tomb of the Unknown Soldier
May 29, 2017
Original image
Library of Congress

On Veterans Day, 1921, President Warren G. Harding presided over an interment ceremony at Arlington National Cemetery for an unknown soldier who died during World War I. Since then, three more soldiers have been added to the Tomb of the Unknowns (also known as the Tomb of the Unknown Soldier) memorial—and one has been disinterred. Below, a few things you might not know about the historic site and the rituals that surround it.

1. THERE WERE FOUR UNKNOWN SOLDIER CANDIDATES FOR THE WWI CRYPT. 

Wikimedia Commons // Public Domain

To ensure a truly random selection, four unknown soldiers were exhumed from four different WWI American cemeteries in France. U.S. Army Sgt. Edward F. Younger, who was wounded in combat and received the Distinguished Service Medal, was chosen to select a soldier for burial at the Tomb of the Unknowns in Arlington. After the four identical caskets were lined up for his inspection, Younger chose the third casket from the left by placing a spray of white roses on it. The chosen soldier was transported to the U.S. on the USS Olympia, while the other three were reburied at Meuse Argonne American Cemetery in France.

2. SIMILARLY, TWO UNKNOWN SOLDIERS WERE SELECTED AS POTENTIAL REPRESENTATIVES OF WWII.

One had served in the European Theater and the other served in the Pacific Theater. The Navy’s only active-duty Medal of Honor recipient, Hospitalman 1st Class William R. Charette, chose one of the identical caskets to go on to Arlington. The other was given a burial at sea.

3. THERE WERE FOUR POTENTIAL KOREAN WAR REPRESENTATIVES.

WikimediaCommons // Public Domain

The soldiers were disinterred from the National Cemetery of the Pacific in Hawaii. This time, Army Master Sgt. Ned Lyle was the one to choose the casket. Along with the unknown soldier from WWII, the unknown Korean War soldier lay in the Capitol Rotunda from May 28 to May 30, 1958.

4. THE VIETNAM WAR UNKNOWN WAS SELECTED ON MAY 17, 1984.

Medal of Honor recipient U.S. Marine Corps Sgt. Maj. Allan Jay Kellogg, Jr., selected the Vietnam War representative during a ceremony at Pearl Harbor.

5. BUT THE VIETNAM VETERAN WASN'T UNKNOWN FOR LONG.

Wikipedia // Public Domain

Thanks to advances in mitochondrial DNA testing, scientists were eventually able to identify the remains of the Vietnam War soldier. On May 14, 1998, the remains were exhumed and tested, revealing the “unknown” soldier to be Air Force 1st Lt. Michael Joseph Blassie (pictured). Blassie was shot down near An Loc, Vietnam, in 1972. After his identification, Blassie’s family had him moved to Jefferson Barracks National Cemetery in St. Louis. Instead of adding another unknown soldier to the Vietnam War crypt, the crypt cover has been replaced with one bearing the inscription, “Honoring and Keeping Faith with America’s Missing Servicemen, 1958-1975.”

6. THE MARBLE SCULPTORS ARE RESPONSIBLE FOR MANY OTHER U.S. MONUMENTS. 

The Tomb was designed by architect Lorimer Rich and sculptor Thomas Hudson Jones, but the actual carving was done by the Piccirilli Brothers. Even if you don’t know them, you know their work: The brothers carved the 19-foot statue of Abraham Lincoln for the Lincoln Memorial, the lions outside of the New York Public Library, the Maine Monument in Central Park, the DuPont Circle Fountain in D.C., and much more.

7. THE TOMB HAS BEEN GUARDED 24/7 SINCE 1937. 

Tomb Guards come from the 3rd U.S. Infantry Regiment "The Old Guard". Serving the U.S. since 1784, the Old Guard is the oldest active infantry unit in the military. They keep watch over the memorial every minute of every day, including when the cemetery is closed and in inclement weather.

8. BECOMING A TOMB GUARD IS INCREDIBLY DIFFICULT.

Members of the Old Guard must apply for the position. If chosen, the applicant goes through an intense training period, in which they must pass tests on weapons, ceremonial steps, cadence, military bearing, uniform preparation, and orders. Although military members are known for their neat uniforms, it’s said that the Tomb Guards have the highest standards of them all. A knowledge test quizzes applicants on their memorization—including punctuation—of 35 pages on the history of the Tomb. Once they’re selected, Guards “walk the mat” in front of the Tomb for anywhere from 30 minutes to two hours, depending on the time of year and time of day. They work in 24-hour shifts, however, and when they aren’t walking the mat, they’re in the living quarters beneath it. This gives the sentinels time to complete training and prepare their uniforms, which can take up to eight hours.

9. THE HONOR IS ALSO INCREDIBLY RARE.

The Tomb Guard badge is the least awarded badge in the Army, and the second least awarded badge in the overall military. (The first is the astronaut badge.) Tomb Guards are held to the highest standards of behavior, and can have their badge taken away for any action on or off duty that could bring disrespect to the Tomb. And that’s for the entire lifetime of the Tomb Guard, even well after his or her guarding duty is over. For the record, it seems that Tomb Guards are rarely female—only three women have held the post.

10. THE STEPS THE GUARDS PERFORM HAVE SPECIFIC MEANING.

Everything the guards do is a series of 21, which alludes to the 21-gun salute. According to TombGuard.org:

The Sentinel does not execute an about face, rather they stop on the 21st step, then turn and face the Tomb for 21 seconds. They then turn to face back down the mat, change the weapon to the outside shoulder, mentally count off 21 seconds, then step off for another 21 step walk down the mat. They face the Tomb at each end of the 21 step walk for 21 seconds. The Sentinel then repeats this over and over until the Guard Change ceremony begins.

SECTIONS
BIG QUESTIONS
BIG QUESTIONS
WEATHER WATCH
BE THE CHANGE
JOB SECRETS
QUIZZES
WORLD WAR 1
SMART SHOPPING
STONES, BONES, & WRECKS
#TBT
THE PRESIDENTS
WORDS
RETROBITUARIES