S.W.
Well, being that the things he loves are mainly sedintary, how about going with the barbeque idea and adding games to it? Like filling two suitcases with clothes and two kids have to put them all on (over their own clothes, of course) and then take them all off...the first one done wins! The funnier the clothes, the better. You can put names in a hat if there are lots of kids and draw names of who does what game/activity. Put an M&M in the bottom of a pie dish, fill the dish with whipped cream. Make two then have a race...the kids have to find the M&M...no hands! Whoever finds it first wins! I bet with these sort of activities he would have a total blast... these kinds of games get everyone laughing... the partipants AND the audience. Good luck!