DO:
- ride the aqua duck
- see the new believe show
- the midship detective search
- walk around
castaway cay - the island is beautiful, excursions here are also nice.
- order room service at least once, if you have a verandah this is nice each morning for breakfast in the room, or if you want to order cookies to have on hand for a snack.
DON'T:
- Waste time just watching a regular movie you could see back home - since you are only on there for 3 days do some other things that you can only do on the ship.
- since you have a 12 yo I am assuming you want to do things together. So skip the spa and obviously the adult only areas.
Another consideration:
If you are also stopping at Nassau, this is always our least favorite port, we never even get off at Nassau anymore. If you have never been there you might want to get off the ship and see it but to be honest if you are not going to the Atlantis resort there isn't much to see, so i may only take you an hour to walk around and then go back to the ship. And since once again you are only doing a 3 night, consider just taking the Nassau day and explore the ship.
These are just some of the things that come to mind.