The Children's Museum of Sonoma County provides hands-on, interactive exhibits and activities in a safe environment that are custom designed for families with children aged ten years old and younger. Rooted in current early childhood research, CMOSC has become a destination and valuable family resource for Sonoma County and across the region, welcoming 150,000 visitors each year. The CMOSC campus includes over 7,000sq ft of existing interior space, coupled with 36,000sq ft of outdoor exhibits. All exhibits are devoted to science, art or nature, with a specific emphasis in Mary’s Garden on environmental sustainability, water conservation and renewable energies.