Kettler Happy AIR Navigator TRICYLE Meet the Kettler Happy Navigator Fly, introducing a convertible tricycle from Kettler with push handle for steering and toddler stroll. Built with a 5 position Quik-Adjust frame with easy step through S-frame, 4 position adjustable ergonomic high back seat with hand hold, and a 3-point seat belt included. The difference is in the tires, AIR tires provide superior traction for sandy, grassy, or gravel surfaces. The quality tires have a patented 3-in-1 auto-freewheel for safe pedaling and braking. It has pneumatic Komfy-Ride tubeless air tires on sealed ball bearings. From stroller to trikes, Kettler makes navigation easy for small children. Our navigation system unlocks rear wheels for steering and features a patented limited turn radius steering device and low center of gravity helps prevent tipping. Kettler trikes put every parent at ease with a patented parental control steering lock. It allows parents to lock the front wheel in a straight position to prevent accidents. Included is a chrome plated push bar that allows parents to fully control steering with toddlers who need extra guidance. This bike is a must for busy toddlers, providing hours of entertainment for you and your child. It features a rear step plate with a removable sand bucket that comes with a rake, shovel, sifter and sand mold.