Cooperative Play refers to a play where the players (children and/or adults) plan, assign roles and play together.
Cooperative play is goal-oriented and children play in an organized manner toward a common end. Emerges around 36 to 48 months of age and continues through the school years.
Moreover, Cooperative play is a "true Social play" in which children cooperate or assume reciprocal roles while pursing shared goals; play that is organized around a theme, with each child taking on a different role that begins at about two (2) years of age.
List of books: Cooperative,Play