For nearly forty years Iona Opie worked with her husband, Peter, on a notable series of books on the traditional lore of childhood, among them Children's Games in Street and Playground, The Singing Game, and The Lore and Language of Schoolchildren. As part of her fieldwork, she visited a local school playground every week, where she would write down events exactly as they happened, and conversations exactly as they were spoken. The result of these...