Next Generation of Razor Riders. The Razor Jr. Folding Kiddie Kick’s three-wheel design and slip-resistant deck help younger riders stay on their toes, while the folding mechanism makes it easy take along to grandma’s or the park. Ready to Grow: Studies suggest that children at age 3 have the coordination required to use a 3-wheeled scooter, but may not have developed the balance required to operate 2-wheeled scooters…