Ask young readers to exercise their imaginations
Random House offers this downloadable guide for teachers.
"Many times, we ask young readers to listen to a story and try to picture the images of the action in their minds. By sharing wordless (or nearly wordless) picture books, we ask young readers to exercise their imaginations in just the opposite way. Young readers can "read" the images of the picture book and create the narrative for the action in their minds. Wordless picture books can help young children think about the basic elements of storytelling, and are perfect for the youngest children who may not have the skills or confidence to read text on their own."