We did Banana Boating this past December at CC. It was a blast. It is a long inflatable "banana" type raft that 8 people sit on (4 on each side) while it is pulled at fast speed by a jet ski. You get very wet, of course, and if in front a lot of salty water in the face. An absolute blast. My 7 year old son and 8 year old daughter did it with us. Also my 17 year old neice had a blast as well. You get life jackets, and they instruct you as to what to do if you need them to stop etc. The kids loved it so much, we did it 2 times. Cost, I beleive was $14 per person for about a 10 minute trip (as I said, don't miss this, you and your 14 year old will have a blast -- well worth it!!!).
We also rented snorkeling equipment, and it was nice, but not as colorful as I had experienced at other islands. Nice fish, but no coral. Still, my 8 y/o daughter had a good time with it.
Finally, my 8 y/o daughter and I did the tandem parasailing at CC(I know what you're thinking, what an expensive day). She found this to be the best of all 3 excursions we did. I was very comfortable and felt quite safe with this. This was on the expensive side, but I knew it would be quite sometime before we ever had the chance to do it again.
Hope this was of some help for you. Any other ???, just ask, and enjoy!!!!!!!!!!!