$20 to $50

AIR-POWER TURBO RACER

Build your very own vending machine! With this engineering kit, you build a toy vending machine that sorts coins, dispenses candy or other small pr...

Investigate physics using technology from medieval times! Build six sleek, updated models of catapults, trebuchets, and other medieval launchers. T...

GECKOBOT 2.0

Build a Hydraulic Plane Launcher and use the power of hydraulic pressure to launch paper airplanes. Once built, fill the syringe with water and pre...

Explore miniature worlds with Isoscapes!Spark your imagination with builds of breathtaking landscapes or intricate metropolitan high-rises—then mak...

Explore miniature worlds with Isoscapes!Spark your imagination with builds of breathtaking landscapes or intricate metropolitan high-rises—then mak...

Welcome to the fascinating world of mechanical engineering! Make 8 motorized robots that move in different ways while exploring how each one uses g...

Future engineers design and build a chain reactions machine using LEGO technic bricks! They'll play, learn, and wow as they construct 20 different ...

Build your own mechanical hand, slip it on like a glove, and get a grip, without motors or electricity. It uses hydraulic power to simulate the mov...

Future engineers enjoy the focused work of this 180-piece cyber hand build that teaches them about mechanical assembly and hydraulics. Once built, ...

Get future engineers on track for STEM learning with this model train set of the future! They'll enjoy the focused work of building this 186-piece ...

SALTWATER FUEL CELL ROBOT

No batteries? Correct! Build 8 sun-powered robots including a crawling bug, a somersaulting armadillo, a roaring dino, a tank, drummer, and more wi...