Yep, all animals play. In fact, human children play- and when allowed to play more often , they're academic skills go up- as evidenced by schools that gave more recess did better in math and grammar than schools that limit recess. An elementary friend of mine, who came from England, was asked how their kids were out performing American kids of the same age and classification, she informed her you won't implement the change. When told give more recess and less homework, the teacher said you're right, we won't do that.

You kill play, you kill learning. You kill learning, you diminish the soul- that was meant to experience and share in joy- play.