This monograph describes a University Affiliated Program's (UAP) initiative that targets the development needs of children from birth to 5 years of age who are homeless and the services and supports provided to their families. The Georgetown University Child Development Center, the UAP for the District of Columbia, has implemented a homelessness initiative that revolves around two projects. The first, Kidstart, is a national project funded by the Better Homes Fund and the Fannie Mae Foundation. Its primary focus is advocacy and developmental services for school-age children and their families who are homeless. The Georgetown Kidstart program is located in a child care center for homeless children. Project staff provide developmental screening and service coordination. The second project, Knock on Every Door, receives primary funding from the Hasbro Children's Foundation to provide developmental screening, assessment, service coordination, advocacy, and support to homeless families with children birth to 5 years of age. Since its inception, over 300 children have received services. Information is provided about: (1) the approaches of both programs, which feature community collaboration and interdisciplinary service delivery; (2) developmental screening and assessment of young children; (3) barriers to accessing services and supports; (4) profiles of two families using services; and (5) recommendations for advocacy and policy development. (Contains 32 references.) (SLD)