We did our first cruise just about a year ago on the Wonder. First of all, if it's a 3 or 4 night cruise, the days will just fly by and it will be over before you know it. Enjoy Castaway Cay. The daughters did parasailing, but other than that, we didn't do any excursions or pay for additional activities and the day still seemed too short, but look at the list of what is available and make your own decision. Be sure to take some time to explore the ship. Because of the size of our party and other personal reasons there were parts of the ship I never even got to look at, let alone experience. There is so much to do and see and so little time, you will need to read the navigator and make some choices.