This brief, the second in a series of three, presents our findings on informal caregivers' and parents' networks, focusing on child care arrangements and sources of support and information related to caregiving from a sample of informal caregivers and parents in Detroit and Wayne County, Michigan. The first brief in this series highlighted the importance of informal child care in Detroit and Wayne County, and described parent and caregiver experiences with informal care. The third brief will discuss barriers that informal caregivers face in providing high quality care, their needs for support, and recommendations for promising approaches to meet their needs. (author abstract)