Finally bought my first trek bike. my granddaughter is dinky only about 28 mounts at 3.5 years old. I bought her a balance bike and she does good with it. but her parents bought her one of those huffy bikes but she could not really peddle it it took too much effort. I dropped by the trek store to get my bike updated and I just could not resist. hauled it over the 6 blocks on the back of my bike. my granddaughter had no problem peddling it. I bet within a month we can take the training wheels off. she just needs to learn to keep going and to deal with the peddles when they are at 6 and 12. what good is you can trade in the trek bike within 3 years for a larger one with a nice discount.