With more than 50 years experience in research and teaching, Joe L. Frost, wrote A History of Children's Play and Play Environments: Toward a Contemporary Child-Saving Movement. He has authored numerous books and articles on the subject of play, playgrounds, safety, children's poverty, and play and child development.
Calvert Vaux was an architect and park planner, who is most known for his work in the creation of Central Park in New York City and Prospect Park in Brooklyn in the 1800s. His chosen title, “landscape architect,” evolved from his strong emphasis on the part nature played in his designs. In his own words, he felt “Nature first and 2d and 3d – Architecture after a while” when creating a park setting.
The rudimentary movement phase ranges from birth to about age 2. It includes the basic motor skills acquired in infancy: reaching, grasping, and releasing objects as well as sitting, standing, and walking.
Equilibrium is the state of balance acquired when contending forces are equal. The "sense of equilibrium" involves having a sense of security when standing, walking, or performing any movement. A number of factors are involved in equilibrium of the body, including visual cues, tactile kinesthetic sensations, and vestibular (inner ear) stimulation.
Formed in 1999, the Alliance for Childhood advocates for children's healthy development, love of learning, and joy in living. The Alliance for Childhood seeks to restore free play for children while warning against the trend of "high stakes" testing in education and the overuse of technology by children that limits their active play time.