Kinemobil

The concept of transforming tension energy to kinetic energy in school books can be dull, but the Kinemobil offers a fun and engaging approach. Its design is archetypal and encourages creativity and experimentation. By using a balloon and rubber, the car can travel farther than expected, and the position of the weight (e.g. a toothpaste tube) can significantly impact its efficiency. The Kinemobil runs on a wind rubber band, and it's made entirely of laser-cut cardboard. The illustrated instructions make it easy to assemble, and everything you need (wooden axes, rubber, balloon, and inflation helper) comes in the box.