body works and interacts with the world, such as making funny sounds or discovering what happens in a fall. Object play, such as playing with toys, banging pots and pans, handling physical things in ways that use curiosity. Social play, play which involves others in activities such as tumbling, making faces, and building connections with another child or group of children. Imaginative or pretend play, in which a child invents scenarios from his or her imagination and acts within them as a form of play, such as princess or pirate play. Storytelling play, the play of learning and language that develops intellect, such as a parent reading aloud to a child, or a child retelling the story in his or her own words. Creative play, by which one plays with imagination to transcend what is known in the current state, to create a higher state. For example, a person might experiment to find a new way to use a musical instrument, thereby taking that form of music to a higher plane; or, as Einstein was known to do, a person might wonder about things which are not yet known and play with unproven ideas as a bridge to the discovery of new knowledge. Another classification system uses categories like these: Replica play, such as playing with toy versions of food in a play kitchen Challenge play, such as solving a Rubik's Cube puzzle Cooperative play, such as playing on a team or making up a new game together Competitive play, such as a footrace Pretend play, such as children pretending to be animals or a storybook character Construction play, such as building with blocks Creative play, such as making up a new story or drawing a picture Nurturing play, such as playing with baby dolls Some forms overlap, such as a relay race (cooperative and competitive) or building a blanket fort (construction and creative). Separate from self-initiated play, play therapy is used as a clinical application of play aimed at treating children who suffer from trauma, emotional issues and other problems. Children In young children, play is frequently associated with cognitive development and socialization. Play that promotes learning and recreation often incorporates toys, props, tools or other playmates. Play can consist of an amusing, pretend or imaginary activity alone or with another. Some forms of play are rehearsals or trials for later life events, such as "play fighting", pretend social