I figured it out when I was 12, your S15 will be fine. Provide transportation for them, but if they have their own money, I don't think you have an issue here.
Our D is just 7 next month so she CAN'T get it done yet. We bought a "coloring with mommy" coloring book, and I framed D's fall school photo. I spent like $5, D gets to give her mom something, and I don't have to feel like a duck on Christmas.
