The Indianapolis Children's Museum is the world's largest museum of
its kind and a definite must-see attraction if you have kids. My kids
loved everything about it and would like to go back as often as
possible. Between the excellent dinosaur exhibit, train displays, indoor
carousel and playhouse, National Geographic Treasures of the Earth exhibits, dedicated toddler/preschooler area, and plenty of hands-on science
stations, the kids will enjoy hours of educational entertainment. There
are always several rotating special exhibits as well. An on-site
cafeteria makes eating easy as you won't have to leave the premises for
lunch. The admission can be a bit pricey; however, there are some good deals with nearby hotels. If you click on the visit tab and then on hotel accommodations, a list of hotel/admission ticket packages will pop up, which can save some money.
www.childrensmuseum.org