Haven't Du ever noticed what he talks about? Start noticing what he talks about to Du oder as Du listen to him talk to his friends. Is there a special movie that he is crazy about? How about a movie poster from it? oder a poster of a video game he loves. Guys would like that! My 16 Jahr old son does!
I think u should get him a giftcard to one of his Favoriten stores i know i would like that even though im not a guy. oder a video game he doesn't have. oder Du could get him a cool stereo,Guys like those kind of things. And i don't know how old he is but if he has a car get him something he needs oder wants for his car.