Children & Nature Network was founded in 2006 to address the Nature Deficit Disorder issue raised by Richard Louv's book Last Child in the Woods. Richard and five other leaders in diverse fields created the nonprofit Children & Nature Network with the initiative to "Leave No Child Inside." Their mission was to reconnect children to nature for two purposes: the physical health, cognitive development, and emotional well-being of the child, and the good of the planet.

Written by Howard P. Chudacoff, Children At Play is a history of children's play in America from 1600 to the 21st century.

A commercial playground equipment manufacturer, Childforms offers a full line of modular play structures and play environments for early childhood and elementary market. They believe in "offering quality products at a fair price with excellent customer service" and in "assisting our children in learning about the health benefits of outdoor play."

As an independent and nonprofit organization, the California Roundtable on Recreation, Parks and Tourism supports both public and private programs in California by coordinating their programs and resources.