Fridge Rover is a magnet and wind-up vehicle all in one. Inside the clockwork mechanism is a coiled spring that is wound more tightly as you turn the handle. This stores energy in the spring (potential energy). When you let go, the spring uncoils, releasing the energy again, and making the wheels turn (kinetic energy). The wheels grip the surface because the magnet pulls the Fridge Rover firmly against the fridge.
Make the coolest 3D pin art on your desk with this amazing desk toy.
This caffeine molecule mug makes an excellent gift!
Build over 100 exciting electronic projects with this easy to use kit!
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
Every kid needs one of these spheres!
Comprehensive collection of 30 fossils.
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