What to get a 13 year old for her birthday?

My sister is turning 13 next week and I’m away at college. I want to buy her something cute and cheap and have it shipped home just to give her a little something. I’m broke (obviously) and I only want to buy her something non-generic (of course she’d love an i tunes gift card or a video game but anyone could get her that) I don’t want it to be a corny coming of age book but I know she’s too old for something like a buildabear now which would have been perfect a few years ago.

If it’s possible even something to signify becoming a “teen”. I feel old just trying to figure out what to get her :(