The sixth stage commonly occurs between 36-48 months, depending upon attention span. Children at this stage enjoy still longer stories, ones with far broader implications, including basic versions of folk and fairy tales. They are likely to request a favorite book over and over, long after it is memorized. They are also hungry for information about the world, they ask Why? Why? How come?, and they absorb early science books with interest. Both fiction and nonfiction provide them with broad opportunities for conversation, which is a great stimulant to both language and intellectual development.