The Program for Infants and Toddlers with Disabilities (Part C of IDEA, the Individuals with Disabilities Act) is a federal program that assists states in operating a system of early intervention supports and services for infants and toddlers with special needs and their families. In Colorado, the Part C initiative is called Early Childhood Connections (ECC). As the lead agency, the Colorado Department of Education is charged with implementing ECC, the statewide comprehensive, coordinated system of supports and services for infants and toddlers with developmental delays and their families. To accomplish this charge, ECC promotes a broad array of interrelated activities. Among ECC's initiatives are those focusing on public awareness, service coordination, cultural competence, and parent leadership. One other such initiative, Babies BELONG, focuses on assuring the quality of early intervention supports and services. It is the belief and policy of ECC that supports and services are most effective when they are provided within families' everyday routines, activities, and places. This guidebook describes this vision for early intervention services in order to assist communities in assuring quality supports and services for infants and toddlers and their families in Colorado. The guide explains ECC's guiding principles, key concepts, background information on which ECC's positions are based, Colorado's policy on provision of services in natural environments, and the Babies BELONG initiative. (Contains 22 references.) (EV)