The intervention is available to all families with newborns who live within a defined service area, which could be a region, county, city, neighborhood, or other geographic area. The model is designed for families with newborns ages 2 to 12 weeks but may reach families earlier or later (as long as the child is under six months old) when special needs are present (for instance, if an infant had been admitted for neonatal intensive care). Sites must have a recruitment plan to reach all families with newborns in their defined service area.