Remember to stick to the subject. Some members of a sixth grade class who once wrote upon this subject told more about spending the money than about earning it. You may write a little introduction telling what the boy or girl wanted the money for, and a short conclusion telling of the pleasure it gave; but the main part of your composition must be about the earning of the money. Put in the little things, or details, that make the story interesting; but be sure that each detail has something to do with your subject.