
Once upon a time, there was a black nail. It was so old that it was beginning to rot. One day, a three year old child found the nail. He looked at it and said, "What is this?"
The child's mother came to see what was wrong. She saw the nail and said, "That is a black nail."
The child frowned. He asked, "But why is it so old? It looks like it is rotting."
His mother smiled. She said, "Over time, nails can get old and start to rot. That's why this one is black. But don't worry, it won't hurt you."
The child was relieved and he went back to playing. From then on, he was careful not to leave any nails outside.
