What about a weekend on CuchieMudlo (or however it's spelt). We had a weekend over there recently for a family function and I was really surprised at how nice it was. The food at the restaurant at the "resort" was absolutely fantastic. I don't know if you can swim over there, but there's obviously water, and there was a playground there. You can walk or scooter around the island. The best thing is it's not far to get there.