Product details:

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. Weighs 9 lbs. Ages 3 years and up to 220 lbs. 10.5 x 31 x 12. No Gears , Batteries or Pedals. Just Steer and Away you Go.