Electric Waterproof Pulse Water Gun Core, Direct Shot Gearbox Switch, Lithium Battery Toy Water Gun Motor Assembly

$9.90

Internal Combustion Engine Model No. 1, Student Physics Experiment Equipment, Small Fuel Engine, Creative Invention Material

$9.96

Zero Degree Water High-Difficulty Tech Invention DIY AI Infrared Left-Right Obstacle Avoidance Car (No Programming Required)

$46.80

Children's Walkie-Talkie AI Robot Science Experiment Educational Wooden Tech DIY Project 200m Wireless Toy

$5.50

STEAM Elementary School Science Experiment Tech Small Production DIY Assembly Educational Toy Metal Detector 6-in-1

$116.00

Automatic Coin-Eating Robot Fun Circuit Switch Children's Science Small Craft Small Invention Tech Festival Project Toy

$55.00

Air Buoyancy Ball Experiment No.1 Tech DIY Magic Prop Hand-Assembled Model Wind Duct Experiment

$3.87

Electric Maze Children's Live Wire Shock Focus Training Circuit Toy Kindergarten Tabletop Game Battle Level Clear

$12.90

Inductive Automatic Dish Soap Foam Machine, Smart Science Project, Innovative Educational Model, Practical DIY Invention

$29.50

Wireless Telegraph Model Morse Code Telegraph Student Science Popularization Handmade Class DIY Remote Control Circuit Simulation Class

$6.07

Children's STEM Science Experiment Elementary School Gift Tech Craft Educational Toy Boys Smart Red-Green Traffic Light

$45.00

Electromagnetic Engine, Electrical and Magnetic Energy, Tech Small Production and Invention, Junior High Science Circuit Experiment Equipment

$33.80