The building was a hospital. You can see the nurse's room with the original, 100 year old paint. There's an iron lung from 50+ years ago and an old switchboard.
Rooms upstairs cover the area by the decade. I especially enjoyed the Route 66 exhibit. Downstairs rooms have special exhibits. Be sure to go to the barn for the buggies and see the locomotive and other outdoor exhibits.
Note, there were no working public restrooms in the building when I was there. Be prepared to use the outside portable toilets.