My kids love going to the Children's Museum. We don't have a pass, and I was surprised at the entrance fees the last time we went, about a month ago. We were invited for a birthday party. I had no idea that the Children's Museum did birthday parties, but it was wonderful and the kids all had a blast.
One complaint I have is that the smocks in the water area don't Velcro any more and kept falling off my kids, so they got pretty wet. But they did dry off eventually.