If there is a swing set, you must swing on it.
The thing about fields is that they were made to be run through. Forests for exploring. Trees for climbing. Rocks for scaling.
Slides require someone to slide down them. Monkey bars are for monkeying. Don’t deny them their birthright.
Trails should be walked upon. Songs must be sung, so sing them.
Such activities cost nothing. All you spend is energy, and yet all you reap is happiness.