Our friend, Roxanne, bought us a summer membership into Sandcastle, which is a small waterpark located just outside of town. It's a little smaller than the water part of Dorney Park, for those who know that. They have three REALLY BIG, steep slides, and five or six tube slide areas, a wave pool, and three small pools for kids. We got into the park at 4PM, and we left when it closed at 6PM.
It was GREAT! We had such a fun time. The first play area, "Wet Willie's", had a playground area inside the pool, with lots of shooting water spouts and slides and such. It was a little too intense for The Boy, being more for kids 5 to 7. The Tadpool, where we spent most of our time, was more his speed. It had a very wide, non-steep slide that The Boy enjoyed, and two steeper slides that he didn't want to do. The Wife and I were even able to trade off and do some slides on our own! We had a nice time.
Best of all? The Boy went down one of the big tube slides with me, in a tandem tube. I think it scared the crap out of him, because he didn't want to do it again. I think he had some amount of fun: he said, "Fun!" and "I was scared!" and "We went so fast!"