Founded in 1925 by Mary Stewart Carey after her visit to the Brooklyn Children’s Museum, The Children’s Museum of Indianapolis grew from a carriage house at The Propylaeum into the world’s largest children’s museum and the fourth-oldest of its kind. Accredited by the American Alliance of Museums, it spans five floors, welcomes more than one million visitors annually, and holds over 130,000 artifacts and exhibit objects. Long-serving leaders expanded its funding, collections, and professional standards, enabling the opening of the present building in 1976. Known for its spiral ramp, major art and science exhibits, and extensive educational programming, it became a landmark in Indianapolis and an influential model for hands-on learning.