This excerpt is one of many that PERFECTLY explain the significance of play in a child's life and the NEED for teachers and parents to make sure that they have the opportunity to play with reckless abandon -
"Free play — tag on the schoolyard, pickup basketball at the park, etc. — is a very complicated thing. It requires young people to negotiate rules among themselves, without the benefit of some third-party authority figure. These skills are hugely important in life. When parents or teachers short-circuit that process by constantly intervening, to stop bullying or just to make sure that everyone plays nice, Horwitz argues, we take "away a key piece of what makes it possible for free people to be peaceful, cooperative people by devising bottom-up solutions to a variety of conflicts." "