It's not a big thing, but for a long time I have gotten my girls each a Christmas ornament that reflects their interests at the time. When they are out on their own, they will have several for their own tree that will remind them of the things they love(d). Last year I got their favorite animals- panda and tiger. Favorite characters, etc. My coup was when I found S'mores Lewis & Clark & Sacagewea ornaments for my girl that is into Lewis & Clark.
DD14 just had a birthday and she got:
an extreme dot-to-dot book (pretty challenging)
a green screen for special effects in iMovie projects
a Genesis compound bow
Dover coloring books designed for adult level coloring
beef jerky
a cool Delia's tee
Extremely Goofy Movie DVD
Kind of an oddball collection, but things she will like! Perhaps she is not a typical teen...but maybe some other girls would like the same things. I also like to just browse
Amazon for gift ideas I never would have thought of on my own.
Oh, speaking of that, I also got her Wreck This Journal by Keri Smith and bought her BFF and my DD11 This is Not a Book also by Keri Smith. They are fun and creative. We also have Finish This Book but the other two would be better choices for teen girls.