It rides on a cushion of air created by pressurized air blowing downward into the rubber air bag skirt, specially designed to "seal" with the ground. Two powerful aircraft style props provide propulsion and steering. The hovercraft blasts over most level surface that is flat and smooth enough to "keep the air in" e.g floor, pavement, dirt, water, ice and snow! Ages 8+ Available in red or blue - advise choice of colour in the comments when ordering.