Book excerpt: A paean to play from an award-winning poet and a New York Times best-selling illustrator. The trappings of childhood change from generation to generation, but there are some timeless activities that every kid loves. Marilyn Singer and LeUyen Pham celebrate these universal types of play, from organized games such as hide-and-seek and hopscotch to imaginative play such as making mud soup or turning a stick into a magic wand. Lyrical poems and bold illustrations capture the energy of a group of children in one neighborhood as they amuse themselves over the course of a summer day. At a time when childhood obesity rates are soaring and money is tight for many families, here is a book that invites readers to join in the fun of active play with games that cost nothing.