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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

free Ages 6 - 11 45 to 60 minutes
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In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time.

free Ages 8 - 18 30 to 45 minutes