What I mean by that is playing three holes takes about 45 minutes to an hour and they need to be able to keep that long of an attention span. Some kids can do that at age four or five. Others may be 15. You're wasting your time and effort if a kid wants to be a kid and not do anything else. Let them be a kid.
People enjoy a playable and pretty golf course.
I shape some of my designs as the result of a story I relate that describes what the average golfer and a pro look for in a golf course. It happened when I was doing a clinic at a golf course with magnificent facilities. Every average golfer there said it was the best they had ever seen. Every pro there said it was the worst golf course they had ever played. What that meant to me was that the average person looks at a golf course and really likes beauty, aesthetics, and how they are treated.