I feel for the "look but don't touch" part. I did the same thing to my son, but in my defense, he's 4 and wasn't quite as into how things worked. He was more interested in anything that was his favorite color (red).

What I did learn about him though was that he has good geek potential, and that he could be entertained for about 2 hours there.

I can't wait to take him back next year.