In case you've wondered (I always have) how works of art are cared for, repaired and conserved, this is the place! They have lots of information on videos and you can see the conservation studios at work.
The top photo is the painting studio where they restore paintings. In the lower photo you can see a repair in progress. See the sign that says 'Art Below' and 'Don't Move'? There's a painting weighted down.
The Center even has a large interactive display in the hallway that discusses careers in art conservation. Perfect for kids who can always use more information about options and opportunities. After all, who knew at age 14 that people make a living repairing masterpieces?
Next time you're in DC visit the Smithsonian American Art Museum (SAAM) w/ the Luce Center for art (thousands of paintings stuffed in glass cases - I love it that their storage area is open to nose around in), the Lunder Conservation Center, the Portrait Gallery and the SAAM.