The Great Plains Nature Center is Great! It just opened in September of 2000 so it is still pretty new. I just went there for the first time this last weekend. There is a giant aquarium with catfish and bass in it. Lots of things for children there also. Kids can see how it feels to touch a coyote's fur or a deer's antler. They can push a button to hear different sounds from different animals. It is a nice place. The Great Plains Nature Center is located at 29th and Woodlawn. Woodlawn is a north and south running street that intersects with Kellog and Douglas.
Omnisphere and Science Center has hands on science exhibits and a planetarium. It is mostly a place for kids but I'll have to admit I had fun there and got my self some neat toys at their shop. It is located next door to the Historical Museum at 220 S. Main Street. It is another of the places in Wichita that is closed on Mondays.