This guide is intended to help parents and practitioners utilize natural settings to meet the developmental and health-related needs of infants and toddlers with developmental delays or disabilities. The mission statement of the Connecticut Birth to Three System is summarized and the term "natural settings" is elaborated on. Federal definitions of "natural environments" are then offered with examples of what service provision in natural environments means and does not mean. Next, the role of Quality Enhancement Teams in reviewing each program is briefly described. The following section looks at natural environments and the Individualized Family Service Plan (IFSP) process. It addresses assessment, family priorities and IFSP outcomes, and supports and service options. Next, seven specific challenges are discussed with recommended strategies for Birth to Three service providers and families. Challenges are about mistaken parental expectations, the role of service coordinators, and the relationship between early interventionists and community service providers. The final section offers guidelines for transitioning from Birth to Three Services at age 3, both to preschool special education services and to community services. Answers to frequently asked questions are also provided. (Contains 20 references.) (DB)