You Will Want to See Friday's Best Amazon Deals

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, January 6.

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

Sennheiser HD 202 II Professional Headphones (Black) for $24.50 (list price $35.00)

Tile Mate - Key Finder. Phone Finder. Anything Finder - 1-pack for $24.99 

TaoTronics TT-BH06 BL Bluetooth Wireless Earphones with Bluetooth 4.1, Balanced Audio, Build-in Mic, aptX, CVC 6.0 Noise-Cancelling - Black for $22.09 (list price $25.99)

LEGO Star Wars Millennium Falcon 75105 Building Kit for $119.00 (list price $149.99)

Bluedio TS-3(Turbine) 2.1 Channel Wireless Bluetooth Speaker with Micro SD Card Slot(Black) for $39.99 (list price $129.99)

Trademark Poker Cherry Bonus Slot Machine Bank with Spinning Reels for $10.99 (list price $14.97)

Esky Solar Hand Crank Self Powered Emergency Radio with LED Flashlight and 1000mAh Power Bank for $19.98 (list price $59.99)

Polaris Optics WingCatcher 8X42 HD Professional Bird Watching Binoculars. COLOR True Clarity and Brightness Close Up or Far Away. Extra Wide Field of View. Close Focus. Waterproof. Fog-Proof for $129.99 (list price $349.99)

HAVIT HV-BT018 Bluetooth 4.1 Transmitter Receiver(aptX), Pair 2 At Once, Mini Wireless Portable Bluetooth Adapter to 3.5mm Audio Devices and Home Stereo, Such as TV, MP3, CD player, PC, eBook reader for $32.99 (list price $69.99)

[Upgraded] Maxboost Wall Charger 4.8A 24W Dual USB Universal Portable Charger with mSmart Technology, Foldable Plug for iPhone 7 6 6s Plus, SE 5/5S, iPad Pro, Galaxy S7, S6 Edge+,S5,Nexus, HTC & more for $9.99 (list price $29.99)

Tiergrade High Speed Car Charger, 3 port QC 3.0 Car Charger Adapter for iPhone 7 6S Plus 6 5SE 5S, Samsung Galaxy S7 S6 Edge, 5 S5 Tab,LG G5,iPad,HTC,Nexus 5X 6P,iPads(Black) for $23.99 (list price $23.99)

LEGO Star Wars Carbon-Freezing Chamber 75137 for $17.49 (list price $24.99)

Zhicity Fast Charging External Battery Lightweight Makeup Mirror for $14.99 (list price $49.99)

SanDisk 16GB Mobile MicroSDHC Class 4 Flash Memory Card With Adapter- SDSDQM-016G-B35A for $5.95 (list price $8.50)

ZEALOT S6 Portable Wireless Bluetooth Speakers Power Bank with Built-in 5200mAh Battery,IP65 Waterproof&Dustproof,Dual Drivers&Subwoofer,Aux Audio/TF Card Supported for $35.99 (list price $99.99)

OtterBox COMMUTER SERIES Case for iPhone 7 (ONLY) - Frustration Free Packaging - BLACK for $19.99 (list price $39.95)

Car Mount, TechMatte MagGrip Air Vent Magnetic Universal Car Mount Holder for Smartphones including iPhone 7, 6, 6S, Galaxy S7, S7 Edge- Black (2 Pack) for $9.99 (list price $49.99)

Bluetooth Headphones by DD, Best Wireless Earbuds with Crystal Clear Sound and Deep Bass, IXP7 Sweatproof/waterproof rating, Noise Cancelling, Comfortable Fit. for $34.99 (list price $169.99)

Earphones, Vomercy Earbuds In Ear Headphones with Mic In Ear iPhone Headphones for $5.99 (list price $29.99)

TechMatte MagGrip Orbit Universal Air Vent Magnetic Car Mount Holder for iPhone 7, 6, 6S, Samsung Galaxy S7, S7 Edge (Black) for $9.29 (list price $29.99)

Polanfo 20000M Power Bank 12000mAh External Battery for Smartphone & Tablets(Gold) for $17.59 (list price $88.00)

Bluetooth Speakers,TaoTronics 14W Stereo Wireless Portable Speaker Pulse X from Dual 7W Drivers, Strong Bass, High Definition Audio, Built-in Microphone for $25.49 (list price $55.99)

Anker SoundCore nano, Super-Portable Bluetooth Speaker, Wireless Speaker with Big Sound and Hands-Free Calling, works with iPhone, iPad, Nexus, Laptops and More - Gray for $16.99 (list price $49.99)

Casio Men's MRW200H-1BV Black Resin Dive Watch for $15.56 (list price $24.95)

Casio Men's AW80D-1AVCB 10-Year Battery Ana-Digi Bracelet Watch for $18.33 (list price $34.95)

Bulova Unisex 96B217 Stainless Steel Watch with Brown Leather Band for $105.00 (list price $150.00)

KITCHEN

Eukein Electric Pepper Grinder or Salt Grinder Mill, Battery Operated with Light At Bottom for $38.95 (list price $79.95)

Eparé 2 oz Strong Double Wall Insulated Thermo Glass Espresso/Demitasse/Lungo Cups, (Set of 4) (Handle) for $24.95 (list price $29.95)

Offset Angled Cake Icing Spatula Knives - Set of 4 - By Bobbi Jeans | Wooden Handle & Stainless Steel Decorating and Baking Supplies - 4", 6", 8" & 10" for $12.97 (list price $27.92)

Electric Gooseneck Kettle for Pour Over Coffee and Tea - 1L Electric Drip Kettle Teapot for $31.99 (list price $99.99)

Checkered Chef Cooling Rack Baking Rack. Stainless Steel Oven and Dishwasher Safe. Fits Half Sheet Cookie Pan for $11.95 (list price $19.95)

Pro Quality Nut Milk Bag - Big 12"X12" Commercial Grade - Reusable Almond Milk Bag & All Purpose Strainer - Fine Mesh Nylon Cheesecloth & Cold Brew Coffee Filter - Free Recipes & Videos (1) for $8.99 (list price $24.95)

Barmix Double Jigger Measure Shot, Stainless Steel (Set of 2 Jiggers) for $5.99 (list price $13.97)

Kitchen Sink Mat OTHWAY Sink Protector Mat with Nice Looking for $6.36 (list price $9.49)

Yoofor Top Quality 18/10 Stainless Steel Watermelon Slicer Corer and Melon Baller, Kitchen Fruit Cutter and Server for $7.49 (list price $29.99)

Spiralizer 5-Blade Vegetable Slicer, Strongest-and-Heaviest Duty, Best Veggie Pasta & Spaghetti Maker for Low Carb/Paleo/Gluten-Free Meals, With 3 Exclusive Recipe eBooks for $29.99 (list price $49.99)

Set of 2 Moscow Mule Copper Mugs with Shot Glass - Two 16 Oz Copper Moscow Mule Mugs - Solid Copper Hammered Mug - Copper Cups for Moscow Mules for $30.99 (list price $69.99)

Top Rated Bellemain Stainless Steel Non-Slip Mixing Bowls with Lids, 4 Piece Set Includes 1 Qt., 1.5 Qt., 3 Qt. & 5 Qt. for $27.50 (list price $29.95)

Totally Bamboo 3 Piece Bamboo Cutting Board Set, For Meat & Veggie Prep, Serve Bread, Crackers & Cheese, Cocktail Bar Board for $12.99 (list price $24.66)

mKitchen Orange Silicone Basting Pastry Oil Brush-Set of 2-Good for Grilling Marinating Turkey Baster and Barbecue Utensil - Desserts Baking for $8.99 (list price $13.98)

Breville BOV450XL Mini Smart Oven with Element IQ for $128.95 (list price $219.99)

KitchenAid K45SSOB 4.5-Quart Classic Series Stand Mixer, Onyx Black for $223.57 (list price $229.00)

Pyrex Prepware 3-Piece Glass Mixing Bowl Set for $9.39 (list price $14.69)

VonShef 3 in 1 Stainless Steel Pasta Maker with 3 Cut Press Blade Settings and Table Top Clamp and FREE Pasta Measuring Tool for $37.95 (list price $79.99)

Vacu Vin Wine Saver Pump with 2 x Vacuum Bottle Stoppers - Black for $12.50 (list price $15.50)

ORBLUE Chef's Knife for $19.87 (list price $49.87)

Marquis by Waterford Brookside 8-Ounce White Wine Glass, Set of 4 for $37.49 (list price $100.00)

Wilton 2105-2174 Mini Springform Pan, Set of 3, Silver for $7.19 (list price $11.99)

Regency Natural Ultra Fine 100% Cotton Cheesecloth 9 sq.ft for $3.99 (list price $9.99)

Sipping Stones - Set of 9 Grey Whiskey Chilling Rocks - Made of 100 Percent Pure Soapstone for $8.95 (list price $18.99)

FoodSaver V3835 Automatic Vacuum Sealing System with SmartSeal Technology for $129.99 (list price $179.99)

Hometech HT-A11 12 Quart 1200W Halogen Infrared Tabletop Convection Countertop Cooking Toaster Oven with 5 Quart Extender Ring(to 17 Quart) for $42.89 (list price $60.99)

Famili MT004 Digital Kitchen Food Meat Cooking Electronic Thermometer Probe for BBQ, Oven, Grill, and Smoker with Timer/Alarm and Large LCD Display for $9.94 (list price $25.99)

Hamilton Beach 70740 8-Cup Food Processor, Black for $21.59 (list price $26.99)

Wilton 2105-459 Excelle Elite 3-Tier Cooling Rack, 15 7/8" X 9 7/8" for $9.04 (list price $11.99)

Orblue Pastry Cutter Stainless Steel - Professional Baking Dough Blender with Blades for $10.87 (list price $18.77)

HOME

J.S. Hanger Solid Wooden Suit Hangers Walnut Finish with Polished Chrome Hooks - 20 Pack for $36.99 (list price $76.00)

Homfa Clear Acrylic Cosmetic Organizer Makeup Holder Display Jewelry Storage Case 4 Drawer for Lipstick Liner Brush Holder for $17.49 (list price $79.99)

Dreamfoam Bedding Queen Copper Gel Memory Foam Mattress for $399.99 (list price $1,199.99)

Levoit Natural Wood Aromatherapy Essential Oil Diffuser with 7 Jelly Colors, 120ml Ultrasonic Air Humidifier for $26.99 (list price $60.99)

BLACK+DECKER BDH2020FLFH MAX Lithium Flex Vacuum with Stick Vacuum Floor Head and Pet Hair Brush, 20-volt - Cordless for $107.00 (list price $129.99)

Elf Stor Premium Green Christmas Tree Bag Holiday Extra Large for up to 9' Tree Storage for $19.88 (list price $39.95)

Lasko 2004W 2-Speed Clip Fan, 6-Inch, White for $16.49 (list price $19.29)

The Original GORILLA GRIP Non-Slip Bath and Shower Mat Featuring Powerful Gripping Technology, Machine Washable, Fits Any Size Bath Tub (Clear: Rectangle 35" x 16") for $12.99 (list price $29.99)

Dyson V6 Motor Head Cord-free Vacuum for $289.99 (list price $399.99)

Mesh Laundry Bags Set of 7, LEYOSOV Delicates Laundry Wash Bags (1 Extra Large, 2 Large, 2 Medium and 2 Bra Washing Bags) Best Protection for Lingerie, Bra, Hosiery, Underwear and Blouse for $10.86 (list price $25.99)

Classic Memory Foam Pillow by Beverly Hills Polo Club - Chiropractor Reccommended Hypoallergenic Vented Cooling Pillows for Back Side and Stomach Sleepers (Standard) for $29.47 (list price $129.99)

BLACK + DECKER CHV1410L 16V Cordless Lithium Hand Vac for $59.88 (list price $89.99)

Winsome Wood Shelf, Espresso for $43.69 (list price $67.49)

AeraMax 100 Home Air Purifier for Allergies and Asthma with 4-Stage Purification for $79.99 (list price $99.99)

Soges Shoe Racks 5 Tiers Solid Wood Shoes Storage Shelf Free Standing Shoes Organizer Black, L15-B for $45.00 (list price $119.00)

Premium 8 Piece Towel Set (Grey); 2 Bath Towels, 2 Hand Towels & 4 Washcloths - Cotton - Machine Washable, Hotel Quality, Super Soft and Highly Absorbent by Utopia Towels for $19.99 (list price $59.99)

Seville Classics Stainless Steel Professional Kitchen Cart Cutting Table for $89.99 (list price $119.99)

Bionaire Warm and Cool Mist Ultrasonic Humidifier, BUL9500B-U for $75.99 (list price $129.99)

Misslo Jewelry Hanging Non-Woven Organizer Holder 32 Pockets 18 Hook and Loops - Black for $7.99 (list price $12.99)

Zinus Modern Studio Collection Deluxe Rectangular Coffee Table, Brown for $39.98 (list price $55.99)

InterDesign Axis Over the Cabinet Kitchen Storage Holder for Plastic and Garbage Bags - Chrome for $15.10 (list price $16.99)

Electrohome Retro Alarm Clock Radio with Motion Activated Night Light and Snooze, Digital AM/FM Radio, Wake-up Light, Dual Alarm, Auto Time Set, Battery Backup, Dimmer, and Temperature Display (CR35) for $24.96 (list price $29.99)

Clorox Disinfecting Wipes Value Pack, Fresh Scent and Citrus Blend, 225 Count for $8.99 (list price $11.97)

Rowenta DW5197 Partner of Fashion Focus Steam 1725-Watt Micro Steam Iron with Stainless Steel Soleplate, 400-Hole, Purple for $64.99 (list price $99.99)

MRS MEYERS Soy Candle Large, Lavender, 14.4 Ounce for $17.78 (list price $19.98)

Essence of Bamboo Pillow with Shredded Latex / Poly Fill Blend and Bamboo Derived Rayon / Poly Cover - Down Alternative and Memory Foam Alternative - 100% Best Sleep Ever Guarantee (Queen) for $24.99 (list price $99.99)

simplehuman Round Step Trash Can, Stainless Steel, Plastic Lid, 30 L / 8 Gal for $39.99 (list price $49.99)

Shilucheng Luxury Fleece Blanket Super SoftWarm Fuzzy Lightweight Bed Blankets (Queen,Cream) for $43.90 (list price $135.00)

Rubbermaid Configurations Custom Closet Folding Laundry Hamper, Natural, 23-in., (FG4D0602NATUR) for $12.99 (list price $22.99)

Swiffer Sweeper Floor Mop Starter Kit, 7 Dry Cloths and 3 Wet Cloths for $10.19 (list price $11.99)

Sterilite 19889804 Storage Boxes,White Lid & Clear Base with Latches,70 Quart/66Liter,4-Pack for $35.99 (list price $49.54)

Dorel Living Slim Recliner, Beige for $159.00 (list price $213.60)

ClosetMaid 8996 Cubeicals 6-Cube Organizer, White for $33.99 (list price $49.99)

CleverMade CleverCrates Collapsible Storage Bin/Container: 62 Liter Solid Wall Utility Basket/Tote, Royal Blue for $20.33 (list price $25.99)

Yankee Candle Company Balsam & Cedar Large Jar Candle for $18.40 (list price $27.99)

Crystal Decor 6" to 14" Inch Dimmable Hand Crafted Natural Himalayan Salt Lamp On Wooden Base - 6 to 7 inches for $27.99

Pure Body Naturals Aromatherapy Top 6 Essential Sampler Oils Kit - 6/10 M for $16.95 (list price $24.95)

URPOWER 2nd Version Essential Oil Diffuser,100ml Aroma Essential Oil Cool Mist Humidifier with Adjustable Mist Mode,Waterless Auto Shut-off and 7 Color LED Lights Changing for Home Office Baby for $21.99 (list price $69.99)

Magnificent 17 X 24 inch Memory Foam Bath Mat, Soft, Non-slip, High Absorbency - 2 Pack (Grey) for $13.49 (list price $29.99)

Cervical Contour Pillow - Memory Foam Chiropractic Vented Cooling Pillow -Chiropractor Recommended Orthopedic Hypoallergenic Pillows for Back and Side Sleepers by Panama Jack for $29.47 (list price $99.99)

Everlasting Comfort 100% Pure Memory Foam Back Cushion - Orthopedic Design for Back Pain Relief - Lumbar Support Pillow With Dual Premium Adjustable Straps for $24.95 (list price $50.00)

HoMedics FB- 600 Foot Salon Pro Pedicure Spa with Heat for $69.88 (list price $79.99)

HEALTH AND BEAUTY

Radha Beauty Aromatherapy Top 6 Essential Oils 100% Pure & Therapeutic grade - Basic Sampler Gift Set & Premium Kit - 6/10 Ml (Lavender, Tea Tree, Eucalyptus, Lemongrass, Orange, Peppermint) for $16.95 (list price $79.99)

Pure Body Naturals Beauty Dead Sea Mud Mask for Facial Treatment, 250g / 8.8 fl.oz for $19.95 (list price $29.95)

Colgate Wisp Portable Mini-Brush Max Fresh, Peppermint, 24 Count for $3.79 (list price $7.99)

Baebody Eye Cream for Dark Circles, Puffiness, Wrinkles and Bags - The Most Effective Anti Aging Eye Gel for Under and Around Eyes - 1.7 fl oz for $23.95 (list price $55.00)

Olay Complete All Day Moisturizer With Sunscreen Broad Spectrum SPF 15 - Sensitive, 4 fl. Oz. for $5.59 

Organic Castor Oil By Sky Organics 16oz: Unrefined, 100% Pure, Hexane-Free Castor Oil - Moisturizing & Healing, For Dry Skin, Hair Growth - For Skin, Hair Care, Eyelashes - Caster Oil for $13.95 (list price $19.95)

E.l.f. Hydrating Face Primer, 0.47 Fluid Ounce for $3.67 (list price $6.00)

Biotin (High Potency) 5000mcg Per Veggie Softgel; Enhanced with Coconut Oil for better absorption; Supports Hair Growth, Glowing Skin and Strong Nails; 120 Mini-Veggie Softgels; Made In USA. for $14.95 (list price $29.95)

All Natural Charcoal Teeth Whitening, 'Tuxedo' Tooth and Gum Powder. Coconut Activated Charcoal and Bentonite Clay Formula. Use Like A Whitening Toothpaste for $21.97 (list price $30.00)

Aveeno Therapeutic Shave Gel, 7 Oz for $3.70 (list price $9.99)

Bio-Oil 4.2oz: Multiuse Skincare Oil for $12.59 (list price $19.99)

Lavender Essential Oil Triple AAA+ Grade Premium Quality - 1 fl. Oz from Pure Body Naturals for $9.95 (list price $15.95)

Radha Beauty Tea Tree Essential Oil 4 oz - 100% Pure Therapeutic Grade for $12.95 (list price $39.99)

Gillette Venus Original Women's Razor Blade Refills, 8 Count for $17.21 (list price $23.99)

Conair 1875 Watt Hair Dryer; White for $12.99 (list price $16.99)

Garnier SkinActive Micellar Cleansing Water All-in-1 Cleanser & Makeup Remover, 13.5 Fluid Ounce for $6.26 (list price $8.99)

Himalayan Salt Body Scrub with Lychee Essential Oil from Majestic Pure, All Natural Scrub to Exfoliate & Moisturize Skin, 12 oz for $12.95 (list price $18.50)

Panasonic ES2113PC Facial Hair Trimmer for Women, with Pivoting Head and Eyebrow Trimmer Attachments, Battery-Operated for $16.49 (list price $19.26)

Suavecito Pomade Firme Hold 4 oz for $13.32 (list price $14.95)

Breathe Blend 100% Pure, Best Therapeutic Grade Essential Oil - 10ml - Comparable to Doterra Breathe, Young Living Raven, Eden's Exhale, Inhale, Respiratory and Sinus Relief - Breathe Easy / Easier - Peppermint, Rosemary, Lemon, Eucalyptus for $7.99 (list price $13.95)

Oleavine Antifungal Soap with Tea Tree and Neem for Body, 12 oz for $14.70 (list price $29.95)

Gillette Fusion ProShield Men's Razor with Flexball Handle and 2 Razor Blade Refills for $10.28 (list price $13.99)

Maybelline New York Instant Age Rewind Eraser Dark Circles Treatment Concealer, Light 120, 0.2-fluid Ounce for $6.79 (list price $9.99)

Cetaphil Moisturizing Cream, 16 Ounce for $10.37 (list price $15.99)

NPW Cat Crazy Nail Art Stickers, Multicolor for $5.82 (list price $6.13)

Best Temperature Color Changing UV Soak Off Gel Nail Polish - New York Frost- Professional Grade - Requires UV or LED Nail Lamp - BONUS Downloadable at Home Gel Nail eGuide Included for $14.99 (list price $36.49)

Onyx Professional Soak Off Coconut Scented Shellac & Gel Nail Polish Remover 16oz, 2 Piece for $6.94 (list price $11.49)

MuscleTech 100% Whey Protein Powder, Triple Chocolate Supreme, 5 Pound for $37.69 (list price $48.91)

Vega Protein & Greens, Vanilla, 1.68 lb (25 Servings) for $29.99 (list price $39.99)

Bracoo Breathable Neoprene Ankle Support, One Size, Black for $20.95

Vitafusion Vitamin D3 Gummy Vitamins, Assorted Flavors, 150 Count (Packaging & Flavors May Vary) for $7.29 (list price $10.49)

Biotin (High Potency) 5000mcg Per Veggie Softgel; Enhanced with Coconut Oil for better absorption; Supports Hair Growth, Glowing Skin and Strong Nails; 120 Mini-Veggie Softgels; Made In USA. for $14.95 (list price $29.95)

Sports Research Vitamin D3 (5000iu) with Organic Coconut Oil, 360 Mini-capsules for $15.95 (list price $29.95)

Nature Made, Vitamin D3 2,000 I.U. Liquid Softgels, 250-Count for $14.00 (list price $21.99)

Vitafusion Gorgeous Hair, Skin & Nails Multivitamin, 135 Count for $10.99 (list price $14.99)

OFFICE, SCHOOL, AND CRAFTS

HP Envy 4520 Wireless All-in-One Photo Printer with Mobile Printing, Instant Ink ready (F0V69A) for $59.86 (list price $79.90)

Crayola Super Tips, Washable Markers, 80 Count, Includes Scented Markers, Art Tools for $13.97 (list price $19.99)

Swingline Commercial Desk Stapler, 20 Sheet Capacity, Black (44401) for $5.98 (list price $7.33)

RoseArt SuperTip Assorted Color Washable Markers 100-Pack for $14.88 (list price $15.99)

Strathmore Sketch Spiral Paper Pad 9"X12"-100 Sheets for $7.98 (list price $10.29)

Fabric Markers 12 Pack Dual Tip MINIMAL BLEED Rich Pigment Fine Permanent Graffiti Coloring Fabric Pens by Crafts 4 All. Child Safe & Non Toxic for $11.99 (list price $17.99)

Sewing Kit, Reignet [All-inclusive] [Handy Durable] Companion Sewing Supplies Kit With Over 65 Pieces for Home, Travel, Camping & Emergency, Great Gift for Beginners, Kids, Girls, Boys, Adults for $11.99 (list price $39.99)

VELCRO Brand - Industrial Strength Tape 4" x 2" Strips, 2 Sets - Black for $2.97 (list price $3.99)

Oxford Ruled Index Cards, 3" x 5", White, 100/Pack (31) for $0.89 (list price $1.00)

Melissa & Doug Wooden Stamp Set: Friendship - 9 Stamps, 5 Colored Pencils, and 2-Color Stamp Pad for $7.24 (list price $9.99)

Colore Colored Pencils - 72 Premium Pre-Sharpened Color Pencil Set For Drawing Coloring Pages - Great Art School Supplies For Kids & Adults Coloring Books - 72 Colors for $24.99 (list price $59.99)

Fiskars Classic Comfort Loop Rotary Cutter, 45mm for $11.39 (list price $17.00)

Speedball 2-Ounce India Ink, Super Black for $3.88 (list price $4.99)

Enchanted Fairy Garden Kit for $14.99 (list price $25.99)

My First Origami Kit: [Origami Kit with Book, 60 Papers, 150 Stickers, 20 Projects] for $8.89 (list price $14.95)

Uchida, Le Pen, 0.3 Millimeter point, Pen Set, 10 Pack, Multicolor for $11.50 (list price $17.39)

OUTDOORS, GARDEN, AND SPORTS

Viper Shot King Sisal/Bristle Steel Tip Dartboard with Staple-Free Bullseye and 6 Darts for $29.99 (list price $39.99)

LE Headlamp LED, 4 Modes Headlight, Battery Powered Helmet Light for Camping, Running, Hiking and Reading, 3 AAA Batteries Included for $7.99 (list price $18.95)

CAP Barbell Standard Bench Black/red for $69.99 (list price $89.49)

CAP Barbell 40-pound Adjustable Dumbbell Set with Case for $39.99 (list price $49.99)

CAP Barbell Standard 1-Inch Barbell Weight Set, 100-Pounds for $89.99 (list price $123.60)

Microlite Microfiber Travel / Camping Towel Bundle - Quick Dry Compact Towels - Extra Large, Large & Small for $27.99 (list price $57.99)

Timbuk2 Classic Messenger Bag, Black, Medium for $69.99 (list price $99.00)

Coleman 24 Can Party Stacker Cooler for $25.09 (list price $33.70)

Camelbak Products Chute Water Bottle, Lime, 0.75-Liter for $9.38 (list price $13.00)

UCO Original Candle Lantern(Anodized Black) for $15.20 (list price $19.99)

InStep Take 2 Double Bicycle Trailer, Red for $106.71 (list price $112.33)

RAD Cycle Products Indoor Portable Magnetic Work Out Bicycle Trainer for $63.13 (list price $229.95)

Schwinn Foot Activated Floor Pump with Gauge for $17.99 (list price $18.99)

Mountain House Chicken Teriyaki with Rice Premium Case Pack for $37.87 (list price $41.99)

Survival Spark Magnesium Survival Fire Starter with Compass and Whistle for $9.95 (list price $17.95)

Quik Chair Folding Quad Camp Chair - Bright Red for $9.01 (list price $14.99)

Coleman 30 Can Cooler, Green for $22.48 (list price $34.99)

AYL TC80 4-In-1 LED Flashlight CREE - Tactical Emergency Nightlight - Telescoping Aluminum Body, Magnetized Base - Water Resistant Handheld Spotlight - Battery Powered for $14.99 (list price $39.99)

SPRI Deluxe Vinyl Dumbbells (Orange, 10-Pound,Set of 2) for $23.28 (list price $33.98)

SPRI Deluxe Vinyl Kettlebell (Purple, 15-Pound) for $24.91 (list price $31.98)

Sand Repellant Lightweight Compact Beach Blanket / Large, Quick Drying, Sand and Water Resistant / With: Sand Pockets, 4 Plastic Stakes and Carry Bag. Color: Blue-Grey for $29.87 (list price $49.97)

Ontario Knife Co 1-18" Military Machete for $18.85 (list price $33.48)

Gaiam Yoga Block, Flower of Life Embossed for $9.55 (list price $10.98)

Victorinox Swiss Army SwissChamp Pocket Knife (Ruby),One Size for $68.11 (list price $99.00)

Pacific Breeze Easy Up Beach Tent Deluxe XL for $99.99 (list price $149.99)

Fat Cat 2-Piece Wall Mounted Billiard/Pool Cue Rack and Accessory Set for $21.95 (list price $29.97)

MalloMe 10-Piece 32-Inch Marshmallow Roasting Stick with 8-Piece Telescoping Smores Skewers, Bag and Ebook for $21.95(list price $49.99)

Bridgestone Golf 2015 e6 Golf Balls , White, Pack of 12 for $19.99 (list price $21.69)

Zippo 6-Hour Hand Warmer, Pearl White for $13.59 (list price $19.95)

Emergency Blanket (6-Pack), Military Green 52" x 82". Designed for NASA with up to 90% Heat Retention. Waterproof, Mylar Thermal Blankets for Backpacking, First Aid Kit, Bug Out Bag for $20.99 (list price $25.99)

Insta-Bed Raised Air Mattress with Never Flat Pump - Queen Pillow Top for $121.48 (list price $209.95)

Spoga Premium Extra Thick 71-Inch Long High Density Exercise Yoga Mat with Comfort Foam and Carrying Straps, Red for $16.99 (list price $19.99)

ELECTRONICS

VIZIO SB3821-C6 38-Inch 2.1 Channel Sound Bar with Wireless Subwoofer for $138.00 (list price $159.99)

Samsung UN65KU7500 Curved 65-Inch 4K Ultra HD Smart LED TV (2016 Model) for $1,299.88 (list price $2,523.10)

Monoprice 109201 12 Outlet Power Surge Protector with Coax Protection, 3420 Joules for $25.99 (list price $32.25)

Optoma HD142X 1080p 3000 Lumens 3D DLP Home Theater Projector for $549.00 (list price $999.00)

ASUS 13.3-inch Black Chromebook [C300AS] Intel Celeron N3060 1.6GHz Processor, 4GB 1866MHz DDR3 Memory, 16GB Flash Storage, HDMI, USB 3.0, SD Card, 15-hour Battery-Life, 802.11AC WiFi for $209.00 (list price $229.00)

NETGEAR AC1750 Smart WiFi Router Dual Core 800MHz Processor - Router Only (R6400-100NAS) for $109.99 (list price $129.99)

Microsoft Arc Touch Mouse Surface Edition for $50.13 (list price $69.99)

WD 4TB My Cloud Personal Network Attached Storage - NAS - WDBCTL0040HWT-NESN for $157.99 (list price $219.99)

SanDisk Cruzer CZ36 64GB USB 2.0 Flash Drive, Frustration-Free Packaging- SDCZ36-064G-AFFP for $12.99 (list price $33.99)

Logitech Bluetooth Multi-Device Keyboard K480 for Computers, Tablets and Smartphones, Black (920-006342) for $25.99 (list price $49.99)

NETGEAR N300 Wall Plug Version Wi-Fi Range Extender (WN3000RP) for $40.86 (list price $89.99)

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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!