The paper summarized the rationale for early intervention programs and describes the major components of the Project WISP (Wyoming Infant Stimulation Program) center-based program for handicapped young children (18-36 months). Early intervention for handicapped children is justified from five points-of-view: prevention of failure during subsequent school years, parent programing, learning, social change, and educational economics. It is explained that Project WISP was established to provide demonstration/replication services to interested individuals throughout Wyoming and to directly serve young handicapped children and their families. Five major components of the model are outlined: screening, instructional development, instruction, and evaluation. Appended are a sample intake form, an excerpt from the Developmental Screening Inventory, an excerpt from the WISP information manual, and an excerpt from SEED (Sewall Early Education Development Program) Developmental Profiles. (SBH)