Provides an overview of development, then describes principles and sequences of physical, cognitive, and social/emotional development at the infant, toddler, preschool, and primary levels. Individual differences and developmental norms are stressed throughout. Contents: Preface. Understanding Early Childhood Development. Infancy: From Cradle to Play Group. Toddlerhood: From Playgroup to Playground. Preschoolers: From Playground to Peer Group. Primary School: From Peer Group to Academics.