Tonight, we read When Pigasso Met Mootisse together as a family as part of the nighttime reading. I picked it up from the library last week (they do have other copies in my local system.
The King and I loved the book - the pictures are fantastic, and the actual Picassos and Matisses that are depicted in pigs and cows are hysterical. There is a decent presentation of modern art including biographies of Picasso and Matisse in the back (did you know that they really were friends?), and also a stong nod to the concept that we have to choose to get along with people who are have different ideas than we do.
Bookworm #2 liked the book because "One time Pigasso and Mootisse met and became good friends. then they got mad and said, "You paint like a wild beast!" and "You paint like a two-year-old!" And then things were not really funny until they started being friends again."