Also, we listened to The Mouse and the Motorcycle on CD. So much fun, and almost exactly the perfect length for the trip! And then I remembered a couple other great audiobooks that we've enjoyed: The Watsons Go to Birmingham -- 1963 and By the Great Horn Spoon.
Another final heads-up: yesterday, we went to the Science Center in Exposition Park. We had a great time, but the fountain in the middle of the rose garden is under construction and a bit of an eyesore.