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.