Surround the children with literature. Provide children with plenty of time to read books that they've selected. Allow children to read books over and over again. This is how readers get to know authors. Time to write.
Students take time to write.
Further, in order for children to invest themselves in their writing, they must be allowed to choose their own topic, storyline, and direction with their piece of writing. Giving the child ownership is critical to her development as a good writer. Purposeful and planful teaching. A touchstone text is the way I introduce my students to writing mentors. After we have read the book, I use mini-lessons to help children learn about the author's style.