Originally Posted by ZeCanon

Keep it fun, and encourage him. Teaching him skills will help him more than anything. That and find out if any of your workouts are close to his, and ride with him.

Kids who start early get in trouble when they get too serious. I can't even count how many fast juniors I've seen fizzle out a year or two after they get into the elite ranks. They go from dominating pre-pubescent kids (fun) to getting owned themselves (not fun), and just stop. Do whatever you can to help him keep the sport in perspective.