I have a 15-year old boy and our family just took a trip in August. Here's what made him happy:
- Spending as much time in the parks as possible.
- Going on as many thrill rides as possible.
- Staying late every night to watch fireworks/Illuminations.
- Eating at any restaurant that had either pizza or burgers on the menu.
He wasn't into characters, character meals, any activities outside of the parks, or even swimming in the resort pools. He was all about eat, sleep, ride, repeat!
I would show the boys a few options and ask them what they'd like to do. They might want nothing more that tons of park time. Makes it fun for them and easy for you.