The story is told of a boy named Johnny who, together with his sister Sally, went to stay with their grandmother for the summer. Johnny had a slingshot and loved shooting rocks at targets, but he was a terrible shot and could never hit anything.
One day, however, he was in the backyard when one of his grandmother’s ducks waddled by. Without thinking, he aimed and let a rock fly. This time, however, he hit his target and killed the duck.
The boy panicked. He hid the bird in the woodpile, only to look up and see his sister Sally watching. After lunch that day, grandma told Sally to help her with the dishes. Sally responded, “Johnny told me he wanted to help you in the kitchen today. Isn’t that right, Johnny?” She then leaned over and whispered in his ear, “Remember the duck!”