Zero To ThreeSince launching in 1977 as the National Center for Clinical Infant Programs, ZERO TO THREE has grown to more than 160 employees working on a wide range of issues impacting infants, toddlers, young children and their families. By bringing together leaders in the fields of medicine, mental health, social science research, child development and community leadership, we have built a strong reputation for delivering quality programs, products and services to millions nationwide and across the globe.