A tiny caterpillar hatches from an egg and feels very hungry. Each day of the week, he eats a different fruit but remains hungry - an apple on Monday, two pears on Tuesday, and so on. By Friday he has eaten five oranges but is still hungry. On Saturday he eats many things but then feels ill. The next day, he eats a leaf and feels better, having grown fat and big. He spins a cocoon and emerges two weeks later as a beautiful butterfly.