I have done all of those. Both jet skis and parasailing are expensive, but are worth doing, in my opinion. Vacations are all about making memories, and I'll never forget or regret that I spent the extra money. Snorkeling is fun, too, but it's not my favorite thing to do in the world. I LOVE the water, but find that it's quite a ways to go to find the cool underwater stuff. Especially when you're also trying to keep an eye on a child at the same time. We fed the stingrays on our first trip, and that was also unforgettable and quite a bit cheaper than jet skis / parasailing. My favorite thing to do at CC? Hang out in the water on an inner tube and lazily float around, then dry off in a hammock and take a little Castaway Nap. This time, DH and I are repeating the jet ski excursion, mostly because it's been a while and we really did have a good time when we did it last. DS is now a teen, and is planning to do the Wild Side excursion with the rest of the teens.