Take the kids to the Scioto Audubon playground. Besides the normal playground equipment, they have a large climbing structure. Here's how the park describes that structure:
The three towers and two arches of the main climbing wall reach a height of 35 feet and extend over 6,100 square feet. The wall features bouldering, top rope and lead climbing. There are four auto belays, but climbers must bring their own climbing harness. Climbers must be age 13 or older (ages 13 to 16 must be accompanied by an adult). There is no age restriction for bouldering on the 10-foot boulders. Small 10-foot boulders are available for kids to climb.