Spotting Shapes is a magazine story.
BoCo and Mavis are working at the Quarry, and to cure their boredom they play a shape-spotting game along the Quarry line. They each spot different shapes including a round wheel, a square box and a triangle sign. When they reach the Quarry BoCo is still too busy finding shapes that he almost rolls under a loose rock. Mavis stops him before it falls onto the line and breaks to pieces. BoCo thanks her, and they agree to be more careful.