This is a wonderful building that opened in 2001. It is located in what was originally the main downtown post office and much of the original Art Deco detailing has been kept or enhanced.
The kid in you will enjoy the Martin Artquest Gallery which is the children's interactive area :) Personally I looooove it !!!!
The galleries in the center are well laid out and local schools are actively encouraged to take tours (under strict guidelines i.e. no touching the exhibits.) My favorites are usually the smaller ones upstairs.
Current exhibits are Twilight Visions, Georgia O'Keeffe and Her Times, and Thomas Hart Benton in Story and Song.
Main web page - http://www.fristcenter.org/site/default.aspx