This awesome company makes balance bikes for the young to learn how to balance correctly, and for those with special needs they have larger models as well. I am buying my son a 20" version so he can learn how to ride a bike. He has been using a "old school" freestyle scooter with 12" wheels for the past couple of years, so, this time it is on to the balance bike. once he gets used to balancing, I have 24" mountain bike ready to go. Hopfully by mid summer he should be off the balance bike and riding the trails with Mom and Dad. That's the plan anyways. Autism has a way of throwing monkey wrenches into plans. but we adapt and work to get everything as smooth as possible.