PlasmaCar (Lime)It's like magic, but you don't need to be a magician to get it to work. The PlasmaCar is a mechanical marvel that makes use of that most inexhaustible of energy sources, kid power, by harnessing the natural forces of inertia, centrifugal force, gravity, and friction. It's so easy to operate; all it needs is a driver and a smooth, flat surface. The PlasmaCar is adult friendly, too. For starters, it doesn't require an expensive power source that needs