Oct
5
The fact that play is so widespread suggests that it arose long ago in the history of animals.2 It appears in many animals with far less social complexity than people have. This universality suggests that even though play is literally fun and games, it must serve some vital function. In other words, when your child is playing, he is doing something crucial for his development. Furthermore, the features of his play are distinctive not only to him but also to humans in general.
Play, Stress, and the Learning Brain - Dana Foundation