crochet headband :: so cute. mine is worn over my ears to keep them toasty.
mason jar sewing kit :: a little sewing kit always comes in handy.
dangly earring display :: there are many different ways to make these with materials on hand.
when i sat and thought about what i would have wanted when i was a teen, i realized i'd pretty much like the same thing now! so the post was changed from 'for teens' to 'young ladies'. here are a few more ideas. please leave any other ideas you may have in the comments!
handmade journal :: every lady needs a space to journal or doodle.
craft-making kit :: introduce her to a new hobby, or replenish the stock of her existing one.
embellished picture frame :: a girl could always use another picture frame.
homemade candle :: use her favorite scent, or lavender oil for calming aromatic therapy.