So after 7 DCL cruises, DH and I have a new plan for Castaway Day. As child free folks, we have usually headed off the shop early to run the 5k and then spent the day at Serenity Bay. We have never been on the Family Beach side. This trip, we still plan on running the 5k, but we are booking the wave runner excursion and plan to do lunch on the family beach side. Is there something fun to do on the family beach side...some kind of water slides or something?