Let's do the twist! Can you say renewable energy? Kids power these colourful, maneuverable little vehicles with some enthusiasm and their own two hands! Easy to operate: just turn the steering wheel back and forth to generate momentum! Physics made fun: learn about inertia, centrifugal force, gravity and friction. Innovative, award-winning mechanical design promotes active play. High quality polyurethane wheels generate more control, faster acceleration and more fun! These wheels are safe indoors on hardwood and laminate flooring as well as outdoor on pavement. Durable plastic construction carries up to 100kg (220lbs).