We received this bike as a hand-me-down bike for my oldest son from a neighbor (my son was 27 months old). This bike is THE SOLE reason my child at 4 years old is now riding a normal bike with pedals. My son used to HATE this bike and be too scared of it. It would wobble and he'd fall and had abandoned the bike for several weeks choosing instead to use a big wheels or something more sturdy. When my son's older friends and neighbors (ages 7-13 - my son then 3 years old) started to go too fast for him to keep up he started on the VELO Junior again. He's now 42 inches tall and 4.5 years old and the bike no longer fits him. He rode the VELO JR. at top speeds from 3 and change to just about 4 years old pushing along and keeping up with his friends. This weekend I told my son who graduated to a real bike but with the pedals taken off that he'd be able to go "super fast" if he chose to use pedals. Always the competitive type but usually reluctant when it comes to trying new things he immediately declined. However 5 minutes later he was begging and pleading for the pedals to be put on. THE FIRST TIME WITH PEDALS - HE GOT IT! No falls, no aching backs...my son rode his bike and pedaled. We have always used the slight slope of our driveway as the way our son would get momentum. With the pedals he pushed off to get speed once, twice and then started pedaling and now he can't stop. Our son is now a cyclist and he can't get enough! I can't say this enough to friends - DON'T EVER DO TRAINING WHEELS! Only use balance bikes and be patient. Your child will get it - keep offering, sometimes force them one or 2 trips down a small slope and they'll get it. Thank you VELO!!!