954chick
+1y
the drag strip idea would be awesome. Maybe get his a few basic models.
One idea that my dad did for me and my brother when we were younger was that he had a car he was getting ready to junk. He went and bought some $.99 cans of spray paint, and let us go to town, making it VERY CLEAR that it was THIS CAR AND ONLY THIS CAR that we can spray paint, and it was a BLAST!!!! I still remember it to this day! I dunno if you wanna go that far...but it'd be fun for a kid.
What about a go-kart track?
Depending on the area, maybe there's a show in the area? You could talk to whoever is hosting the show, see if you could have him called up on the stage (maybe have a small birthday trophy made for him) and have his birthday recognized in front of everyone?