Part of a series for 4-H members between 9 and 19 years of age, this age-graded guide is designed to help children and adolescents: (1) understand the toddler's physical, mental, social, and emotional growth; (2) learn to care for a toddler; and (3) choose types of play that toddlers enjoy. Contents include suggestions on projects that 4-H members can undertake; information on toddlers' development; an observation form; guidelines on communicating with toddlers; recommendations for feeding and clothing toddlers and for helping toddlers with bathroom activities; discussion of ways toddlers learn through play; and guidelines for evaluating toys. Sources for additional help with projects are listed. A "leader's guide" for both the infant and toddler units is appended. (RH)