Play is a serious business. The pioneering developmental psychologist Lev Vygotsky thought that, in the preschool years, play is the leading source of development. Through play children learn and practice many basic social skills. They develop a sense of self, learn to interact with other children, how to make friends, how to lie and how to role-play. The classic study of how play develops in children was carried out by Mildred Parten in the late 1920s at the Institute of Child ... [more]