In 1986, Congress enacted Public Law 99-457, which outlined requirements for statewide early intervention systems and preschool services to assist young children who are either developmentally delayed or who have certain conditions which carry with them a high probability of resulting in developmental delay. Now known as the Individuals with Disabilities Education Act (IDEA), the law includes the following two programs that specifically target young children, birth through 5 years of age, with special needs: (1) the Program for Infants and Toddlers with Disabilities (previously Part H); and (2) the Preschool Grants Program (Part B, Section 619). This paper describes these two programs and discusses research findings about the effectiveness of early intervention for children with special needs. A table outlining some of the services provided under IDEA is included. Two case examples are given to illustrate the types of services that might be included in an early intervention program. The document also includes references and contact information for the National Information Center for Children and Youth with Disabilities (NICHCY). (SG)