I can't describe it as well, but picture in your mind snowboarders doing tricks that flip their snowboards around as they jump in the air and you get the idea. Think of this as the bicycle with training wheels that leads eventually to mountain biking. Even children who have difficulty with balance and coordinating their bodies have fun with this toy.
A simple piece of plastic, but the children I know love it and will keep trying even if they fall off. To have an activity that children like enough to stay with it even if it's tough makes it a winner in my book.