Secret Santa help!!!?

At school we are doing Secret Santa. I got this guy who is a Freshman, likes drawing (he is good at little cartoon people), and likes music such as techno, hard rock, is pretty smart. etc. When thinking of appropriate gifts, please keep in mind that he is kind of reserved (esp. around girls, which he avoids if possible) (so nothing weird, please, like snowman poop) and that I am a girl. According to the rules we can do one big gift, several small leading up to a big, they can be prank (this one dude got polly pockets), or serious, and the max that we spend is $15. So far I got a splatter painting, and starbucks gift card w/ starbucks coffee. Thanks!