Nature & Science

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...

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...

Sure, they're iconic. But more than that, the flowing pink wax/pink liquid and hypnotic light have the power to calm, in a fast-spinning world. A b...

This light might be mini, but its groovy LED-powered glow is a BIG addition to any room! At just over 6 in. tall, this nightlight is all the fun of...

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

What's cooler than building a bot? Building 8 of 'em! A 48-page, full-color book guides the assembly, and a compact solar panel gives them power. T...