< P> Children& #8217; s play is a universal human activity, and one that serves a significant purpose in personal development. Throughout this volume, which is an extension of the 33rd Annual Meeting of the Jean Piaget Society, the editors and contributors explore assumptions about play and its status as a unique and universal activity in humans. As a whole, < i> Play and Development < /i> delves into three lines of research concerning this topic: examining these assumptions from an ethological perspective, exploring the view of research that shows play to be socially...