During the State Fair of Texas, the African American Museum is open seven days a week from 10 a.m. to 7 p.m.
The brochure claims this museum has the largest collection of African-American folk art, and I believe it is true after being there.
Along with the art pieces there are archives and documents that "reflect the African American experience" (quote from the brochure).
The building is gorgeous inside (breathtaking really) and located on the fair grounds near the Science and Nature Museums, so it's easy to fold in.
Families that like art museums will enjoy this museum, as will children interested in history and primary documents. I believe this museum is geared towards older children, my thought is 4th or 5th grade and up.
The African-American Museum has one of the largest—and best—collections of African-American folk art in the country, as well as cultural and historical exhibits. The interior of the building is also impressive.