The excitement of the great outdoors is back at the Ohio State Fairgrounds, thanks to the Ohio Department of Natural Resources (ODNR). According to Richland Source, families can find fun and free activities at the Natural Resources Park open to all in the southeast corner of the fairgrounds, every day from 10 a.m. until 7 p.m. during the State Fair, which runs July 27 to Aug. 7 in Columbus.