What should I get my boyfriend for his sixteenth birthday?

I've been with my boyfriend for a few months now. I'm 14 and his 16th birthday is coming up soon. I'm so stuck on idea's for a birthday present! He's not a big fan of music, or cars, or football, or any sport really. He's getting a moped soon, but I don't know what I can buy him for that? People have suggested buying him a t-shirt, but others say clothes are a bit risky? I really don't know, please help! Thank you so much!