One thing that never dawned on me when ds was smaller, because there weren't any in our area are "splash pads". Parks that have water features where kids can play in areas where water shoots out and kids can play around, splash in the water. I noticed a sign when we were at Disney last year warning parents not to let children use them if they have skin rashes, gi issues, are wearing diapers and not to let them ingest the water because they RECIRCULATE the water. Ewww!