"How do adults recapture that feeling of joy that children get from play?"
This is what psychologist Mihaly Csikszentmihalyi wanted to know. He was a Croation-born professor of American psychology at the Claremont Graduate University in Claremont, CA and spent years studying the state of being that he called "flow."
Flow is what we feel when we are totally absorbed in an activity for its own sake. This does not refer to a game where you win or lose or to watching a game.Â
"You don't get much out of the passive consumption of pleasure," Csikszentmihalyi says, "compared to enjoyment which is much more active and creative and self-directive."

Gardening is a great example of an activity that is creative, self directed and gets you into the flow.
 You lose yourself when outdoors, turning over the soil, planting, deadheading, weeding, edging, watering or even raking the gravel (!?)  Well, maybe you don't actually rake gravel but you get the idea.

Flow is what I call 'stop time'...sometimes time stops when you are absorbed in an activity or in experiencing a special place. Intuitive thought and insight come to you when you are in such a state. I love ‘stop time’.
‘Stop time’ is especially sweet when you experience it outdoors. Staring at a flower or tomato, marveling at a pine tree or palm, you don’t care about the ticking of a clock. It is not important. Nature rules instead.
So get in the flow and spend some time outdoors today.... rain or shine.
I felt it even as I was reading - that's a complete description of my head space when I'm out in the garden - it is without question a supremely gratifying use of time; bringing with it an ability to lose track of time. Nature is an amazing dance partner.