Disport - to amuse oneself in light or lively manner; to frolic.

One of the more enjoyable activities in my life is watching my dogs playing in the back yard.  To sit on the step in the sun (not too hot) and the gentle breezes (not to strong or too cold) and watch them chasing, wrestling, and disporting themselves is one of the more carefree times in my day.  I can't imagine myself having that kind of energy anymore, but it's rewarding to share in theirs, if only second-hand.