Use brainstorming and freewriting to develop an idea for a children's picture book.
Use a word processor to flesh out the story for the children's picture book. Print out one sentence per page to make yourself a dummy book. Edit the story to a final draft.
Research new trends in the children's book publishing industry by browsing new children's books at your local library. Visit your local book store and spend time researching books there. Read or re-read classic children's books to familiarize yourself with older version of successful children's book. Use a book publisher guide online or a printed version to narrow the type of children's picture book publisher you would like to publish your book.
Create a query letter describing your children's picture book. Include relevant information about the story and your experience as a writer. Send a sample chapter only if requested by the children's book publisher to do so.
Print out manuscript versions of the complete picture book and be sure to include your name on each page. Follow the instructions provided in the submission guidelines from the publisher. (Some children's book publishers will not accept multiple submissions.)
Continue contacting publishers and writing query letters. When you receive an offer to have your children's picture book published, hire a lawyer to review the terms of the contract.