I tried my kids w/ RC cars, then crawlers, etc.. when they were younger (like 3-7) ...it was mostly a crash fest. Just in the last 4 or 5 months my son started saying he wanted to go to RC events w/ me (as I go a few times a month). I still was cautious and really didn't take it too serious, yet after several months of him asking me (he's now 10, almost 11) I decided to take him to the track for a practice session. He loved it and told me that if he could he'd do this all day long! So now 3 practice session under his belt he is ready for his first race this coming weekend. It is pretty cool, as now I can take him w/ me. I dedicate a lot of time to his football (he loves football), but now its great that he can start to partake in my hobby. ...I have an 8 year old boy also, yet he's not interested and not really ready. I'll give him a few years.

If your son isn't interested or its too difficult you can always try when he's a little older. I let my son come to me this time ...so it is pretty cool. I now have a buddy to share my race tent with! (reminds me I got to pick up a second chair this week).