The KETTLER Happy Navigator 4-in-1 Trike grows with your little one from 10 to 72 months, transforming from parent-controlled ride on to kids’ tricycle. Unique removable and adjustable features make sure your little one has a trike for every stage of their development. As your child grows, you can swap the footrests for pedals, adjusting or removing the parent handle and back support as needed. The KETTLER Happy Navigator 4-in-1 Trike evolves in 4 stages to ease your child into pedaling themselves.