What to get my boyfriend for Christmas!? HELP!!?

My boyfriend is 17 and a senior in highschool and I'm 17 and a junior. We'll be dating for 18 months tomorrow :) I don't know what to get him for christmas! He doeen't do sports, he's on math team and science olympiad haha needless to say he's really smart. One thing he absolutely loves is the electric b. He already has a stand and amp though. I got him a picture frame with a picture of us in it for his bday last july and for past christmases and bdays ive gotten him cds or books so I want to give him something different! My mom said to get him a pair or nice black leather winter gloves but I think that that's way too practical and strange but I can't think of anything else! Please help!