Remember those carefree summer days you had as a kid, playing tag or pickup softball in the park? Sure, it may just seem like fun and games, but it may also have been invaluable training. A new generation of researchers is discovering that play is how the young brain prepares for adult life. This hour — as if you needed a reason — a reminder to get out and have some fun. Learning Through Play; A Perfect Playground; The Strangest Playground In the World; An Animated Life; Video Games In The Classroom.