We've reduced play to be this cherry on top of an already good life. But from a scientific perspective, it is much more fundamental than that. Play is what happens anytime we choose to do something without knowing exactly where it's going to end up.
What if the actual reward is not accomplishment but the act of creating? The finished products and trappings of creative accomplishment are often seen as the goal. But I believe that the act of making is like oxygen. When the making stops, it becomes hard to breathe.