In Arm in Arm, Remy Charlip, the great children's book author and illustrator, is at his most playful, his zaniest, funniest, and cleverest. He rewrites the rules of riddles, tongue twisters, puns, and performance-based play, or rather, throws all rules out the window. Some pages require turning the book completely around, 360 degrees. A magnifying glass may also be useful. It is a book for kids of all ages.