I would recommend skipping the WL playground and going to the one at FW instead. The playground at WL isn't very impressive IMHO and you are dealing with sand as well. The sand will definitely follow you back to BLT! The playground at FW is bigger and has swings. The kids can also look around the petting zoo, take a pony ride (fee for this), and see the barn and horses used at the Magic Kingdom. You could even take the kids for a carriage ride around FW if you timed it right. Before you head back on the boat you can easily hit the store and pick up a mickey bar or some other treat for the kids. Enjoy!