Hedgehog (16"): Perfect for ages 4-6 (17 to 21-inch inseam). It feels and performs like a tiny mountain bike and weighs around 16 lbs. This brand is no longer made, but it's a highly desirable kids bike brand, high quality, durable, and geometry suits kids. Hand brakes to get them used to a real bike, and back pedal is freewheel. If your kid is still getting used to a balance bike, the pedals are easily removed. My kid started pedaling 1st time getting on this bike- never needed training wheels! It's only been used a short time, garage storage the last two years. It has upgraded, wider knobby tires.