"In addition, help your children learn self-discipline by such activities as learning to play a musical instrument or other demanding skill. I am reminded of the story of the salesman who came to a house one hot summer day. Through the screen door he could see a young boy practicing his scales on the piano. His baseball glove and hat were by the side of the piano bench. He said, "Say, boy, is your mother home?" To which the boy replied, "What do you think?" Thank heavens for conscientious parents!"