Sometimes adults are anxious to just complete the task of reading from start to finish, yet much learning can happen during interruptions. Talk about how the story might have ended differently. Write down their own version of a story. Count how many Stop Signs there are between home and Nana's House. Let your child hold the Cheerios coupon and find the box on the shelf in the grocery store.
Children learn through repetition.
So, when you are asked to read a favorite story for the hundredth time, do not get frustrated.