Contains the keyword Play--Psychological aspects
"The role of play in development is a source of ongoing interest and debate. In this book, renowned expert Peter Smith offers an expansive definition of the term 'play,' taking an in-depth look at its impact on children, as well as its adaptive value in animals."
"In this book, Pellegrini argues that play is an excellent example of the ways in which biology and culture influence each other, especially during childhood. Specifically, the innovative possibilities associated with different forms of play behavior during the juvenile period can influence individuals' skill acquisition, and possibly influence the development of the species."