The PlasmaCar is easy to operate, and helps your child develop coordination, balance, and motor skills while harnessing the natural forces of inertia, centrifugal force, gravity, and friction. PlasmaCar is adult-friendly too: it doesn’t require an expensive power source that needs constant replacement, it provides kids with plenty of exercise, and it is quiet, the only sound you’ll hear is the sound of the wheels. NO BATTERIES, GEARS, OR PEDALS - The Original PlasmaCar is kid friendly and easy to use. Just prop your feet up on the footrests and turn the steering wheel to get moving. USE INDOORS OR OUT – Made for either outdoor or indoor use, the sleek design allows for exhilarating speeds up to 6 mph on smooth flat surfaces. USE INDOORS OR OUT – Made for either outdoor or indoor use, the sleek design allows for exhilarating speeds up to 6 mph on smooth flat surfaces.