Out of his own boyhood experience with a slingshot, the author decided to write a story about a boy who, after hearing the story of David and Goliath, wanted to learn to use the sling for fun. He became so caught up in the fun of it that he practiced until he was expert in its use. His expertise caused him to become unintentionally involved in one adventure after another, having to use his sling to either help someone or get himself out of a jam. His parents are trying to "train him up in the way he should go" as he grows up. They warn him of the great responsibility he has to use the sling safely. His father uses Bible Scripture to teach him the lessons of Christian living along the way.