Tom, sounds like a busy day for you! Bring your son to the 3 pm meet if he would like to meet some other kids. It makes it easier to enjoy the clubs if they see some familiar faces. There are at least a couple near his age. We took our first DCL trip in 1999, thinking it would be a once in a lifetime thing....this is our 12th. Be careful or you will get hooked!
Sounds a lot like modding a car. Very easy to get hooked.