It's a friend's little sister's birthday, and she's just 15 years old. Whew, so young! I can't remember when's the last time I made a card for a teenager. So it was a little challenging to think of a suitable design.
Anyway, I decided on a baby blue card stock as my base and the design just developed from there
Here are the tools I used.
And here's the end result.
I'm not sure if this is a 15-year-old appropriate birthday card design, but I hope the recipient appreciates the effort anyway.