In this activity (located on page 9 of the PDF), learners are introduced to Aesop's fable, "The Crow and the Pitcher." In the story, a clever crow drops pebbles into a pitcher to cause the water level to rise. Eventually, the water is high enough for the crow to take a drink. Learners predict and experiment to see how many pebbles it would take to create the same outcome as in the fable. Use this activity to introduce the concepts of volume and displacement.