You can often find them in local churches. Many churches have a collection of such stories for children to read during religious education or quiet time. They are usually freely available to the members of the congregation.
Some religious bookstores might offer free children's devotional stories as part of their community outreach. They could be in the form of pamphlets or small booklets. Additionally, certain religious organizations' websites may also have a section dedicated to these stories where you can download them for free.
Libraries are another great place to look. Although not all libraries will have a large selection, some do carry religious materials for children. You can check with your local library and ask if they have any free children's devotional stories available, either in print or in an e - book format.