Go rock climbing, ride a turn-of-the-century carousel, or check out outerspace at the SpaceQuest Planetarium. The Children's Museum of Indianapolis is one of the largest children's museum in the world. The 356,000-square-foot facility houses 10 major galleries that explore the physical and natural sciences, history, world cultures and the arts. Whenever possible, exhibits are "hands-on" or participatory in nature. The museum presents thousands of programs and activities each year.