The Joovy Bicycoo is a durable, well designed balance bike for kids 3 years and above. The frame is made of aluminum so it is strong and lightweight just like high-end bikes. The lightweight frame makes controlling the bike much easier for kids, unlike the heavy wooden and steel versions. The tires are pneumatic (air) and refillable. Many balance bikes on the market use EVA plastic tires which are cheaper and wear out much quicker than the rubber tires used on the Joovy Bicycoo. The suspension qualities of pneumatic tires give kids a smoother ride. There is also a hand brake for the rear tire. The seat is adjustable and features 12 inch tires.