"Young Children's Relationship with Nature:Its Importance to Children's Development & the Earth's Future", Randy White, White Hutchinson Leisure & Learning Group.

"The Benefits of Play, Time for Play, Every Day: It's Fun — and Fundamental" The Alliance For Childhood.

"Developing an Earth-bound Culture Through Design of Childhood Habitats" , Robin C. Moore and Nilda G. Cosco, Department of Landscape Architecture, NC State University.

"Teaching and Learning in Nature: Let’s Go Outside", U.S. Fish & Wildlife Service

"The Importance of Play in Promoting Healthy Child Development and Maintaining Strong Parent-Child Bonds", Kenneth R. Ginsburg, MD, MSEd, and the Committee on Communications
and the Committee on Psychosocial Aspects of Child and Family Health, American Academy of Pediatrics.

"Children's Outdoor Play & Learning Environments:Returning to Nature", By Randy White & Vicki Stoecklin, White Hutchinson Leisure & Learning Group