A Speed Zone party
The best birthday party I ever attended was a 30th party. I was living in another city at the time and we boys got together at a place very similar to the Speed Zone in Dallas and raced cars. It wasn't that expensive, and it was a heckuva lot of fun. My son's not quite old enough, but in a few years I think it'd be fun to have him celebrate a birthday at the local Speed Zone. Fun for me at least. As long as he realizes that it's not a "driver's ed" class.