The City Museum, of course, is nothing new. In fact, it's almost fifteen years old. But that doesn't make it any less awesome. The key to staying relevant for the City Museum is owner/creative director Bob Cassilly's nonstop imagination. "People keep coming back because we're always changing," director Rick Erwin says. "Bob is here all the time thinking of the next thing, thinking of every square inch and how to make it better and more fun." This year the City Museum introduced a whole new corner of the museum, featuring multi-level slides (including its first slide with a hill), tree houses and caves. Slides. Tree houses. Caves. Your inner child is positively wriggling to be set free.