A quote from Instruction Sheet in Lego Toys (quoted in J. Panksepp, Affective Neuroscience):
"When children play, they exercise their senses, their intellect, their emotions, their imagination - keenly and energetically.... To play is to explore, to discover and to experiment. Playing helps children develop ideas and gain experience. It gives them wealth of knowledge and information about the world in which they live - and about themselves. So to play is to learn. Play is fun for children. But it's much more than that - it's good for them, and it's necessary.... Play gives children the opportunity to develop and use the many talents they were born with."