See if he was a girl I would have all kinds of fun craft ideas for you. I know nothing about boys! (other than they are mean, smell like boys and like to make messes). Decoupage maybe?

My 14 yr old nephew is really into science. He also still loves legos. But most days you can find him in front of a video game or outside playing football. What if he is kind of the ring leader for the smaller kids? Like playing red light green light? He can be the one calling the shots?

Or... you know Uno is a wonderful game I don't care how old you are!