I bought my kids (then 4 and 6) Honda CRF50's. They love them. And I love them. Reliable, tough, starts every time and zero maintenance other than an oil change once a month. (Yes, they ride them that much) I don't think you can break those bikes.No mixing fuel, no batteries that go dead. They just keep going all day, every day. The best is you can sell them for $300 less for what you bought them for once the outgrow them. A little more money initially, but well worth the fun at the end.