engineering kit best sellers

#1 DIY Robotic Mechanical Smartivity DIY Robotic Mechanical Hand STEM Toy for Kids 8-9-10-11-12-13-14 Years Old | 2024 Parents Choice Award Winner I Birthday Gift for Boys & Girls | Engineering Kit for 8-14 Years Old

$29.99 on Amazon

#2 Bike Motor Kit 80cc Motorized IMAYCC Bike Motor Kit 80cc Motorized Bike Kit 2 Stroke Bicycle Engine Kit with Wired Digital Computer Fit for 26-28" Bikes

$141.99 on Amazon

#3 Bike Motor Kit 80cc Motorized IMAYCC Bike Motor Kit 80cc Motorized Bike Kit 2 Stroke Bicycle Engine Kit with Wired Digital Computer Fit for 26-28" Bikes

$139.99 on Amazon

#4 STEM Kits for Kids Ages SCAEMO STEM Kits for Kids Ages 8-10-12-14, Stem Toys For Boys Age 8-12, Science Projects For Kids Ages 8-12, Solar Car Building Kits for Boys, Activities Engineering Kit, Gifts For 8 9 10 11 12 Year Old Boys

$16.23 on Amazon

#5 🔥 🆕 ButterflyEdufields 100 BUTTERFLY EDUFIELDS ButterflyEdufields 100+ STEM Projects | Girls Mini Engineering Kit for Ages 8 10 12 15 Years | Ultimate DIY Science Experiments for Kids | Educational Engineering Toys Best Birthday Gift idea

$35.87 on Amazon

#6 2.0 Paper Airplane Conversion POWERUP 2.0 Paper Airplane Conversion Kit | Electric Motor for DIY Paper Planes | Fly Longer and Farther | Perfect for Kids & Adults | Ready to Use Aeroplane Engine Kits

$19.99 on Amazon

#7 STEM Kits for Kids Age CYOEST STEM Kits for Kids Age 8-10-12-14, Science Kits for Kids Age 8-12, STEM Toys Gifts for Boys Age 8 9 10 12 13 14, Car Building Science Experiment Projects for Kids 9-12, Solar Power & Engineering Kit

$16.23 on Amazon

#8 🔥 Model Engine Kit with Discovery #Mindblown Model Engine Kit, with Moving Motor Parts And LED Lights

$29.97 on Walmart

#9 🔥 496 Pcs Technical Parts SSHLKBB 496 Pcs Technical Parts Building Blocks Gears Axle Pin Connector Compatible with Major Brand Toy Technical Cam Worm Cogs Gears Steering Parts Differential Engine Kit MOC Pieces for Replacement

$19.99 on Amazon

#10 66cc 80cc Bicycle Engine 66cc 80cc Bicycle Engine Kit Motorized Gas 415chain Cycle Bicycle

$6.99 on Ebay

#11 125CC 4 Stroke Engine LIYUANJUN 125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor

$149.99 on Amazon

#12 49cc 50cc 2 Stroke Racing SIOHDAGU 49cc 50cc 2 Stroke Racing Engine Motor, Gasoline Engine Single Cylinder Pull Rope Start Motor for Dirt Bike Pocket Bike ATV Scooters, Pocket Bike Engine Kits

$49.25 on Amazon

#13 STEM Kits for Kids Age CYOEST STEM Kits for Kids Age 8-10-12-14, Science Projects for Kids Ages 8-12, Stem Building Toys for Boys Age 8 9 10 12 13 14, Solar Car & STEM Activities Engineering Kits, Gifts for Boys

$16.99 on Amazon

#14 80cc Bike Bicycle Motorized 80cc Bike Bicycle Motorized 2 Stroke Petrol Gas Motor Engine Kit Set US STOCK

$199.99 on Ebay

#15 🆕 GY6 125cc 150cc to 155cc LK LEAPING KNIGHT GY6 125cc 150cc to 155cc 58.5mm Cylinder Head with Assembly Valves Gasket Kit for 152QMI 157QMJ Scooter Moped ATV Go Kart Quad Engine,High Performance Powersports Engine Kit,Non EGR Type

$29.99 on Amazon

#16 🔥 53cc 4 Stroke Bicycle JAYEUW 53cc 4-Stroke Bicycle Engine Kit, 53cc Bike Engine Kit Gas Petrol Motorized Bicycle Kit Bike Motor Kit Fits 28" V-Frame Bikes and 26" ATV Bikes (US Stock)

$219.99 on Amazon

#17 Motorcycle Oil Cooler USTPO Motorcycle Oil Cooler Cooling Radiator Engine Kit Universal for CRF XR KLX 50 70 90 110 125 140cc SSR Taotao Coolster Kayo Apollo Dirt Pit Bike ATV Red

$49.99 on Amazon

#18 Avenger 85cc 52mm 2 Stroke Avenger 85cc 52mm 2 Stroke High Performance Motorized Bike Bicycle Engine Kit

$199 on Ebay

#19 🔥 Fan Relay Cooling Engine WANZUWBIP Fan Relay Cooling Engine Kit for 2005-2006 Wrangler TJ 2005-2008 Town Pacifica Country Grand Caravan 2005-2007 902-310 68023333AA

$25.99 on Amazon

#20 🔥 2 Stroke Pedal Cycle Sange 2 Stroke Pedal Cycle Petrol Gas Motor Conversion Kit Air Cooling Motorized Engine Kit for Motorized Bike (100cc Silver)

$125.99 on Amazon