Uncle has said that Anna must be good and keep up while he shows all the grown-ups around the big art gallery where he works. She's not to ask questions or touch anything, or get tired or want to go to the bathroom. Almost immediately, Anna has a problem--when you've got to go, you've just got to go. A laughing self-portrait of Rembrandt tells Anna of a toilet exhibited by Marcel Duchamp, and she begins to search for it. Along the way, she is painted by Edvard Munch and talks to Vincent van Gogh, who's upset that no one wants his paintings. Pablo Picasso offers her a snack of square apples and triangle pears. Andy Warhol is painting soup cans, but nobody--not Cezanne, nor Matisse, nor any of the others--can tell her where Duchamp's toilet is. Finally Jackson Pollack, who's painting messily on the floor, shows her the way--but Duchamp's toilet is not what she expected.
