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Wear shoes and clothes you can move in. It really is one of the coolest indoor spaces I've ever seen.

The zoo is fantastic as well. Best penguin exhibit I've ever seen.

You don't need kids to have fun there.

I think I might have had more fun than my kids did. Climbing outside in rebar tubes 40 feet above the ground is a lot of fun. We didn't do the 7 story slide though - we walked up there but the line was not moving at all.

We are going back this summer (I live in New England but go home to Southern Illinois every summer for a visit).