The unique self propelled ride on toy for children (however adults can ride it too!!). didi car is safe and ideal to use indoors or outdoors on any hard, smooth and flat surface. This is a fun way to get some exercise in any setting and promotes physical development as well as balance, co-ordination, spacial and speed awareness. didi car provides all the above, but above all else it's just plain FUN!! Cost is for 3 Didi cars only.