The Segway was invented by Dean Kamen. It is alittle under ametre tall and weights 31,kilogram. It has two wheels, just like other scooters. But the segway's wheels are not at the front and the back-they are at the sides! It has an electric motor, and can go as fast as 20 kilometres an hour. It is slso very difficult for a rider to fall off a Segway because the motor is heavy, and close to the ground. Dean thinks the Segway will become very popular. He hopes it will one day replace cars in big cities.