When it first appeared in 1993, Barrie Thorne's Gender Play: Girls and Boys in School became an instant classic in the budding fields of feminist sociology and childhood studies. Through detailed first-hand observations of fourth and fifth graders at play, she investigated questions like: Why do girls and boys tend to self-segregate in the schoolyard? What can playful teasing and ritualized games like "cooties" and "chase and kiss" teach us...