COSI always brings out the kid in all of us, but with opening the massive new planetarium last year, and hosting popular exhibits like "The International Exhibition of Sherlock Holmes," there's something for everybody. Also, Rat Basketball!

COSI always brings out the kid in all of us, but with opening the massive new planetarium last year, and hosting popular exhibits like "The International Exhibition of Sherlock Holmes," there's something for everybody. Also, Rat Basketball!

Runners-up: Columbus Museum Art, Wexner Center for the Arts

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