i used to date a boy who collected old atari games. there was one he couldn't find and i ordered it from radio shack (i have no idea if you can still do this). he LOVED it.
us girls assume romantic is good, but boys aren't like that. i've tried slightly romantic stuff and gotten nowhere. if you remember something he really likes try that. food, hobbies, sports, whatever. that stuff has always gone over the best in my experiences.
and food is good. boys like food.