Young Isabelle and her best friend Charlie, the Big Green Rabbit, learn that calories are "little balls of energy" that are burned when you move, dance and play. Concepts of healthy eating, exercise and nature exploration are key components of this episode. Songs and videos include the "Big Green Rabbit Theme Song," "Mashed Potato," "Rhino," "Iguana," "Green Anaconda" and "Calorie." Songs are accompanied by easy to follow dances demonstrated by the Great Big Green Dancers and Isabelle.