This study reports on the needs of young children in Idaho, relating to: (1) health and related factors during early childhood, (2) heredity and environmental factors which influence the child's development. Initial data were drawn from already existing studies and sources. Missing data were collected in face-to-face interviews with 2 percent of the families in Idaho having children between the ages of 0 and 6. Additional data were collected from both public and private vendors of service to help complete the needs picture. Vendors of health services were contacted, and the proportion of need they were meeting was calculated. Health factors including hazardous environments, chronic illnesses, acute illnesses, dental health, and nutrition were assessed. Traditional child development factors including cognitive development, social development, and special needs were assessed. Programs attempting to meet these needs were reviewed. The vendors of such services were interviewed, and estimates of the unmet needs were established. The programs reviewed included preschools, kindergartens, and day care centers. Results are summarized in profile form. (Author)