Play. It's an attitude. A willingness. Play a game. Play a sport. Make up a contest in your head. It can be silly. Play keeps the spirit loose. Keeps it open. Makes it better equipped to receive wonder. Kick a stone down the sidewalk and pretend it's a soccer ball. Splash that puddle when you are out alone on the road. Engage the child in checkers. Work on your hide-and-seek game. You will never calcify if you remember to play.