Agree that should probably avoid a direct gift, perhapes a book or something adressed to him and put in his mail box, or see if his school does a chrismass thing taht you could work through depending if you want to take it that far.
doing a quick reread not sure if a book would be the best, =P have to judge if he has the attention span, one possible thing is with the price of hardware and components dropping through the floor is that you can pick up things like small radios that are decent for really low prices torchs/ mini led lamps ect
your in / near palmy arnt you ? id be happy to chip in if so. had enough 'stink' birthdays/ xmas days to be happy to help some one else.