Mentioned by Big Brave Nomad
What to do in Saint Louis with Kids
"In 1993 a 10 story, 600,000 square foot shoe factory was purchased and turned into a “city within a city” - a creation of interactive art exhibits straight from your dreams. The musuem officially opened in 1997 and has been home to some of the largest and most unique art exhibits in the United States. Here you will find 10-Story slides, indoor/outdoor adventure, a rooftop area to explore, Toddler Town, a network of caves, and so much more!"