The frog scooter is propelled simply by an easy scissors-like feet motion. In other words, the rider just spreads his or her feet as a pair of scissors kick or frog kick, and then the scooter moves forward smoothly. It is easy to learn how to ride and the speed can be reached up to 10 km an hour if the road is smooth and soft. More important,there are two separate back brakes to ensure safety. Apart from the enjoyment of riding and getting exercise, thigh muscles and pelvic floor muscels are also developed.durability.