Twist the skewer in a circular motion toward the cardboard-stuck thumbtacks, which will wind up the rubber band. After two complete revolutions, set the car down on a flat surface, and release it. The stored energy of the rubber band will rotate the tires and propel the car forward. read more
You can build a self-powered car science project with objects such as a mouse trap or a balloon. Self-propelled cars are an example of physics, demonstrating kinetic energy. read more