Designed as a guide for adults who wish to lead a group of 10- to 13-year-olds through a series of discoveries about preschoolers and how they grow, activity materials are presented concerning physical, intellectual, and social development (Section 1); and children's feelings (Section 2). Specifically, Section 1 discuss children's developing awareness of the body, understanding of the world, and relationships with family members and other people. Units of Section 2 describe the feelings of a young child in general, a child's feelings about self, and a child's feelings about others. Each of the units includes (1) introductory statements presenting the principal ideas in each unit; (2) selected topics for group discussion; (3) suggested activities building on the discussions; and (4) brief descriptions of mini-projects preteens can implement among preschoolers. A section on resource material describes ways children learn, ways of facilitating language acquisition, finger plays and action rhymes, concept and language activities, and includes guidelines about reading books and telling stories to young children. A guide to understanding children's feelings offers examples of gambits that invite conversation, as well as brief descriptions of aspects of effective listening and strategies for coping with feelings. Observation sheets and an individualized contract for program participants are provided. (RH)