This presentation discusses the question, "What makes a parent program effective?" by reviewing some of the author's professional experiences within a framework of a planning model borrowed from Lillie and Maslow. The planning model consists of four components: information, interaction, involvement, and insight. The four components may be present in parent programs in different amounts and differing degrees of success. Programs are seen to undergo distinct stages of growth and development. Initially, information is directed one way. If the information presented to parents is not immediately useful, parents may not attend later sessions. It is advisable to be parsimonious with information and to provide opportunities for parents to interact during presentations through question and discussion sessions and through narration of their own and their children's experiences. It is important to recognize that interested parents have considerable expertise in most topics related to their children. Transition to the involvement stage of parent participation in child service programs demands more support and direction from program personnel to parents. If trust is built through interaction and involvement, parents may exhibit a greater willingness to attempt new ideas and practices. Guidelines for providing information, facilitating interaction, and promoting involvement and insight are offered. (Author/RH)