The Individuals with Disabilities Education Act (IDEA, P.L. 108-446) is primarily thought of as the nation's special education law, and Part B, which focuses on providing special education and related services to children with disabilities between the ages of 3 and 21 years old, is the largest part of the IDEA both in terms of populations served and funding level. However, the IDEA covers more than special education. Part C, the focus of this report, authorizes state grants for programs serving infants and toddlers with disabilities. Part C extends IDEA programs to infants and toddlers with disabilities from birth to their third birthdays, when children become eligible for services under Part B of the IDEA. Congress recognizes "the significant brain development that occurs during a child's first 3 years of life," as a reason Part C of the IDEA is needed, and specifies Part C's intent to "enhance the capacity of State and local agencies and service providers to identify, evaluate, and meet the needs of all children, particularly minority, low-income, inner city, and rural children, and infants and toddlers in foster care."