You've got a couple more months to check out the BIGGEST EXHIBITION OF ALL TIME wait, no, it was the biggest movie of all time. In any case, Avatar: The Exhibition at The Children's Museum is definitely worth a visit before Sept. 22 because a) it's a good way to prepare your children for living on a globally warmed, natural resource depleted planet (they'll have to learn sometime); b) you can pretend to be a Na'vi (in an awesome motion-capture chamber) and create Pandora plants; and c) there are real-live props and costumes.
3000 N. Meridian St., 334-4000, childrensmuseum.org
2nd: Indianapolis Museum of Art
3rd: Indiana State Museum