If she goes to the stack to be with other teens she may like the teen only excursions. The have at least one is almost everyport. On castaway cay they have a really cool one that is walking, snorkeling, kayaking and then lunch. It is about 4 hours I believe. They go to a part of the island that is off limits to everyone else. A couple of islands have catamaran excursions with snorkeling. Lots of teens seem to like the swim with the dolphin excursions too. The teen club on board has lots of activites, which are teens only no adults allowed in the club accept for the counselors.
Teens seem to love it, they even have their own arcade in the club.
mom x4,grandma x4