"Play: Activity that is not required, but is enjoyed."

i just found this website page that explains exactly what Ive ben getting at.
I dont have time right ow to rereasd through it, but the gist Im getting from it is that play is how kids develop, learn and express themselves. Im not sure if this is great or terrible from my point of view but Im hoping to make the most of this new info. It explains the importance of play, and the different ways we play at different stages. Im not sure how to interpret it for adults but I plan to continue to look into it more. That will probably direct me where I want to go next.