$25 to $50

Going up! Build an adorable robotic gecko that defies gravity to crawl up, down, and all around smooth vertical surfaces! As you assemble this moto...

Build a series of adorable, motorized robotic animals with this introductory mechanical engineering kit for kids ages five and up. A beautifully il...

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 ...

Never too young to be a visionary. Create even more robots with Roboflex Plus! The new, flexible, extendable magnetic bars add an extra dimension t...

Future mechanical engineers supercharge their STEM learning while assembling 5 cool solar-powered robots! The easy-to-use building system and step-...

How cool is it that the mainspring stores energy, then converts it to motion? Discover the physics of potential and kinetic energy and the inner wo...

The power of wind makes them go - and you'll have fun building 6 awesome bots that move without any batteries at all. Easy, snap-together assembly ...