In a book that takes play seriously, the author points out the meaning, necessity, benefits of free and self-initiated activity for one's own satisfaction. Play provides an outlet for self expression, aggression, creative drives; it broadens and deepens life interests and bolsters self esteem. To skimp on it is to tamper with mental and emotional health. With such an understanding of play the author lists and discusses play possibilities, from sports and games to travel, nature, the arts, the social area. Summaries, helpful hints, advice as to the ways of going at things and the rewards they bring, and a bibliography add to a carefully, responsibly written book.