There is a bunch of things teens can do, but some do cost money, like the Teen Spa times. For the 3 and 4 day Wonder Cruises, it's on Nassau Day that teens can go to the spa (from 8am-2pm) and get a mini manicure, a mini peticure, a mini facial, and a product to take home. It costs $69 and you make the appointment when you get on the ship.
Another activity on Nassau day is the Teen Junkanoo cruise. It's like a club on a boat, which circles the harbor of Nassau and Paridise Island for a few hours, and I STRONGLY recommend it. I forget how much it costs, but I'm sure you can find that out.
There's also a bunch of activities on the ship (for teens) like karaoke (sp?), trivia contests, scavenger hunts, sporting contests, and all sorts of stuff!
~*~Toni~*~