Children love patterns and repetitious language. From the time learn to speak, they develop a special relationship with these forms of words. They are quick to pickup on them and connect with books that use them. The Napping House by Audrey Wood is reminiscent of the rhyme: This Is The House That Jack Built. Ms. Wood does a beautiful job of using pattern while weaving together a fun story.
Ready to write a picture book or rewrite a draft of one? Try to create a story rich in pattern. A character may repeat the same behavior or say a particular sentence every other page. Jacob Two-Two series by Mordecia Richler features a boy who repeats somethings twice, the behavior is part of his charm. If You Give A Mouse A Cookie and If You Give A Moose A Muffin by Laura Numeroff are still popular because of their use of pattern.
Be brave. Embrace the power of pattern in picture books.