is he into bakugan or anything like that, i just made a pin the tail on the donkey board style game but with bakugan, put cards on it and blind folded them and made them try and find the card and put a sticker on it each card had a value, and after 4 goes total score was added up and we had a winner.

will elaborate more if you like the idea

maybe do a treasure hunt, hide clues around teh house yard etc nd then in teams they have to find the answer to the clues.