I have so many fond memories of COSI. It used to be on Broad Street, across from the original Wendy's location. We took school field trips there in elementary school and our parents took us at least once a year. I always liked the town of yesteryear and the coal mine. I haven't visited since they moved to the new location. I've seen it featured on the show Columbus Neighborhoods on PBS and it looks wonderful. It would be a lot of fun to take a little one there!