Erg and Luli head into the woods to find some more pine cones for the fire, but as they collect them they are sure they can see a shadow in the trees. What could it be? This story is perfect for learning about life in the Stone Age.Erg and Luli head into the woods to find some more pine cones for the fire, but as they collect them they are sure they can see a shadow in the trees. What could it be? This story is perfect for learning about life in the Stone Age.