Once upon a time, there was a little boy named Tim. Tim had a toy box that was always open. One day, he found a small piece of coal in his toy box. Tim was very curious about the coal.
Tim went to his mom and asked, "Mom, what is this black thing?" His mom said, "That is coal, Tim. It is very dirty. You should close your toy box so it stays clean." Tim didn't listen to his mom and left the toy box open.
Later that day, Tim played with the coal and his toys. The coal made his toys very dirty. Tim's mom saw the dirty toys and was very sad. She said, "Tim, I told you to close your toy box. Now your toys are dirty, and we cannot clean them." Tim felt bad for not listening to his mom. The toys stayed dirty, and Tim learned to always close his toy box.
