For me the thrill of parenting, of playing in particular, is in knowing that some part of what we do together in carefree abandon is creating an experience that means something later. Our play feeds the unconscious mind with happy feelings and happy connections that inform us later. Later we act kindly, or serve others, or create something the world needs, or simply spread goodwill. I believe these things come out of satisfied experiences in childhood. Play is good for the world.