You could get him the Lego Star Wars game - do you have a gaming system? It's a fun game. Easy enough for even me to play. You get to blow up lots of lego stuff.
We have the lego starwars video game for PC. It is BlackBeltBoy's favorite game.
He also has it for PlayStation2, which resides at grandma's house.
Jr's Nintendo 64 is currently inoperable because he took the controllers to a friend's house last summer...before that friend went off to college. I've been nagging him to get them back.
His Playstation II is currently not working. I have a guide to repair it, but haven't gotten to it yet.