What is the best gift for 13 year old boys from their girlfriend?

I've been there so give him this:

Well, if he has an iPod, give him an iTunes gift card. If he doesnt, then give him clone, remember not an expensive one, cuz then he will think he has to spend big on you, also if you are going to give him clone, make sure it is not that strong!! Also when you give him clone, everytime he puts it on he will think of you. :)

Hope this helps.