The Children’s Museum of Indianapolis is a museum dedicated to children's education and exploration, located in Indianapolis, Indiana, United States. It was founded in 1925 and is considered the largest children's museum in the world, with over 472,900 square feet of exhibit space spread over five floors.

The museum offers a wide variety of exhibits and activities, including interactive exhibits on science, technology, engineering, and math (STEM) subjects, arts and culture, world cultures, and the natural world. The Dinosphere exhibit is particularly popular, featuring life-size dinosaur skeletons and fossils, as well as interactive activities that allow visitors to learn about paleontology.

The museum also features a planetarium, which screens educational movies about space, astronomy, and the natural world. In addition, there is a large outdoor play space, where children can explore nature, climb trees, and play in the water.