We have an 11 year old and a 4 year old. And I honestly hadn't thought of taking a change of clothes into the parks for either of them until I saw references to taking a change of clothes in other threads. I'm as likely to make a mess of myself as my 11 year old is. And the 4 year old has been reliably potty trained for over a year. She won't be going on any of the "wet" rides, at least I don't think she will. She might get food on herself, but that's true everywhere and I don't take a change of clothes for her to restaurants or the zoo or anything anymore. Worst case scenario, I can buy her some clean/dry clothes at the park, right?