Here are a few links to art websites you might find interesting.
- Art by Keith Haring
http://www.haringkids.com
- The National Gallery of Art
http://www.nga.gov/kids
- The Phillips Collection, a great museum in Washington, DC
http://www.phillipscollection.org - The National Portrait Gallery
http://www.npg.si.edu/ - The American Art museum, one of my favorites.
http://www.americanart.si.edu/index3.cfm - The National Building Museum
http://www.nbm.org/