This document summarizes the design principles and elements used in "A Smiley Story" children's book. Key design choices included using a friendly font, framing characters and images centrally for focus, employing yellow and black colors to represent the smiling and grumpy characters, and utilizing repetition, symmetry, emphasis through positioning and isolation to tell the story with minimal graphics. Gestalt principles of figure/ground and similarity were also applied to create familiarity between the characters.