Artists of all ages are invited to add their own hues to Grant Wood's "American Gothic, "Renoir's "Luncheon of the Boating Party, " Winslow Homer's "Snap the Whip, "as well as works by Edgar Degas, Mary Cassatt, Edward Hopper, John Singer Sargent, Henri de Toulouse-Lautrec, Vincent van Gogh, and masterpieces by 51 other great artists.