After the singing of a hymn or two, prayer and collection, let one of the children, in the manner of the preacher speaking to his audience, tell in his own way of the "Oyster and Crab" and of God's purpose in giving us a conscience, and let him or her draw the moral lessons and impress the spiritual truths. Even if it is done in but few words, or a faltering way, do not embarrass or discourage by criticisms. Speak words of encouragement. If preferred, the little sermon may be a presentation of the sermon preached by the pastor in the morning, or one child may present the object sermon of last Sunday and another child the sermon by the pastor in the morning. The more who take part, the better, as variety adds to the interest. Then gather the children around close so they can see the pictures as you read the following sermon. Have the apples at hand also for demonstration. THE object which I have chosen to-day, is one with which I am sure every boy and girl is thoroughly familiar. The moment you see it you recognize it. This large and beautiful apple is one of the most perfect of its kind, large in size, beautiful in color, and one which tempts the appetite of any one who is hungry. Now, boys and girls, I have here another object. Can you tell me what this is? I expected that you would say that it was an apple, and that is true. But you have not told me the whole truth concerning it. This is not only an apple, but it is a wormy apple. It did not grow as large as the other, and, by looking at the outside, I see that it is defective. It is stunted, like wormy apples quite universally are. You might think that the worm went into this apple because it was not full grown and strong and large, the same as it is sometimes thought that boys who have never improved their advantages, but have failed to become noble and good, therefore sin has entered their hearts. The truth is just the reverse; wickedness first possessed their hearts, and that has been the cause of their failure to improve their opportunities, and to become manly, and noble, and good, and kind. If they had first got the evil and sin out of their hearts, they would surely have stood a much better chance. They would have become Christians, and have grown up more and more like Christ, to be good, and kind, and generous, and useful. [Illustration: Worm in the Apple.]