This manual describes the benefits and procedures for implementing a developmental play program. It is intended to be used by both the leader--a counselor, teacher, or other professional--and students who have been trained in the peer facilitator skills. The manual does not include a detailed training program for peer facilitators, but the nature of the training required and suggested materials are included. In the first of the manual's four chapters, general information about developmental play as a project for peer facilitators is provided. The second chapter examines play as an important aspect of development. Intellectual, emotional, and social development are discussed, and opportunities for growth in these areas through play are examined. The third chapter provides information for beginning a developmental play program. Issues discussed are: identifying a need for developmental play; approaching the personnel; selecting and training peer facilitators; and informing parents. The fourth chapter looks at procedures for implementing play times, which are the periods of play designed to enhance the development of children ages 4 through 6 exhibiting developmental delays, whether intellectual, social, or emotional. The format for the play times is described with suggested time periods included. The beginning and closing circles, which provide the transitions between the regular educational program of the students and the play time activities, are described. Individual time, supervision, and types of participants for play time are discussed. Fifteen play times are included with specific objectives outlined, and suggestions for length of time needed. For each play time a supervision section is included with supervisor questions and suggestions for peer supervisor reactions. Numerous black and white photographs illustrate the text, and a list of 49 references is provided. (LLL)