8 is good if the kid wants to learn it. I have seen many learn at that age. Some just are not ready.

Some of the new electrics are pretty good if you want a toy don't feel he will go far in the hobby, but I don't really like most of them. If it is something he will stick with for a long time, then get with a club and get good equipt that will last a long time.

I think you will find that most that young don't fully appreciate it.