My step-brother is 13, and not big on thank you's. I don't make my kids write thank you notes (usually) but I do make them call whoever sent the gift immediately. So, for my step-brother's birthday this past summer, he got a box of thank you notes. I wrapped them nicely & left it on my mom's porch, as usual. Still didn't get a thank you note, so the little f'er isn't getting *anything* from us for christmas, and neither is his rude father. Sorry, I don't have time or money to waste on ingrates.