I'm mentoring a 9 year old boy, and overall we get along quite well, and he enjoys spending time with me. The only thing that gives me pause is that he doesn't have, nor does he know how to ride a bike. It's especially frustrating because he lives maddeningly close to the bike trail. His mother is the same, so she's not of much help. My question is, assuming for the moment that he has a bike, how can/would/should one teach a 9 year old how to ride a bike? Would he need training wheels of some sort, or is he old enough that it wouldn't be necessary? Of course, as much padding as possible would be good. Having ridden bikes all my life, I have no idea what is innate about it, what comes as you get older, and what's truly learned behavior.