Morals
Learning the difference between right and wrong is a key milestone on the road of "growing up to not be a psychopath." For the most, part parents already do this fairly well by teaching by example. My only recommendation then, is for parents to be conscious of the limited scope of moral scenarios their daily lives present, and to begin fabricating moral dilemmas so that their brood can see how to react in more complicated scenarios. A basic "kill one to save a dozen" example from classic utilitarianism can turn an ordinary day at the petting zoo into a memorable learning experience.