There's an oft-repeated story about a little boy and a butterfly, which goes thus- O nce a little boy playing outdoors, found a fascinating caterpillar. He carefully picked it up and took it home to show his mother. He asked his mother if he could keep it, and she said he could if he would take good care of it. The little boy got a large jar from his mother and put plants to eat, and a stick to climb on, in the jar. Every day he watched the caterpillar and brought it new plants to eat. One day the caterpillar climbed up the stick and started acting strangely. The boy worriedly called his mother who came and understood that the caterpillar was creating a cocoon. The mother explained to the boy how the caterpillar was going to go through a metamorphosis and become a butterfly. The little boy was thrilled to hear about the changes his caterpillar would go through. He watched every day, waiting for the butterfly to emerge. Then it happened, a small hole appeared in the cocoon...