The Ezyroller moves like a snake without chains, pedals or batteriesNo need for a downhill slope to move forward, Just an easy gentle swinging movement on the front paddle generates forward momentum The child also uses their feet to steer the EzyrollerIt is super-easy and super-fun, We have yet to meet a child who is not riding and having fun in under 1 minuteThe Ezyroller can be ridden on any hard surface, indoors and outdoors