music, cool clothes, of u could save it for something big. Go shopping at your fave stores and if u see something u like, go for it. Your mom probably wants u to spend it on your birthday.
CD's of iTunes. When u find a song that has a good beat and good sound, there's nothing better than that. I reccomend Panic at the Disco and My Chemical Romance.
Get a DSi XL! It's a DSi but it's BIG! of for DS, a game called Scribble Knots! u can write in anything (some stuff won't work)and it comes up on the screen! u play as a boy named Maxwell, and he can kill the things u make! It's so fun! Oh, and Happy Birthday!That's a pic of a cute zeehond, seal on its back! LOL so cute!
I don't know your preferences, but I know I'd buy manga. I love me some good manga. I'd probably get some One Piece, Ouran High School Host Club, DNAngel, InuYasha, and Naruto. Then I'd only have 5 bucks left, but I would be very satisfied with my new purchases. (I recommend getting your TokyoPop favorieten before it closes it's American branch. Just sayin'.)