Our eldest son recently started reading Robinson Crusoe with his Grandpa. So enthusiastic was he about this story that he started a game with his brothers where they re-enacted it, setting up their pop-up tent on their 'island' and casting the baby as their goat! Lunch was not pasta, but roasted tortoise!
I love to see this imaginative interaction with literature. It is what reading should be all about. I maintain that creative play and oral narration are especially relevant and important for boys, and will lead to great writing later on.
A teacher recently told me her first struggle with children's writing is building their vocabulary, as they are often not exposed to a rich variety of language. Reading great literature with our children, though it might be beyond the child's own reading level, feeds their vocabulary and imagination and expands their world. There is still no substitute for a terrific story!