Still in China, so just a brief recollection.
When my son Davy was about six or seven, I asked him what the point is in thinking about right and wrong, good and bad, fair and unfair. He said that most of the kids who talked a lot about things like sharing and fairness seemed to want you to share with them.
We might think of this as "ethics in the second person" -- ethics that focuses on telling the people around you what they are morally required do, with no particular concern about applying the same norms to one's own actions. Of course, ethics in the second person needn't always arise from the motives that drive it in envious six-year-olds! And yet I'm inclined to think that one advantage of hanging around with children is that they reveal to us our vices purer, simpler, and less well disguised.