Select a few genres the Bible employs to share with your preschoolers. Don't try to tackle every type of genre, as this will overwhelm your students. Share a short verse or passage from each of your selected genres to help your students identify different types of genre. You could share a short parable from the New Testament or a brief song from the Old Testament book of Psalms. Realize that while your preschoolers can understand the different types of writing, they may not be able to remember each genre perfectly, so be patient with your students.
Find a brief moral lesson in each passage you share to discuss with your students. Choose lessons that your students find valuable and that apply to them. For example, don't focus on Bible lessons about adultery when dealing with preschool students. Instead, choose scripture passages that talk about dealing with enemies and friends, helping others and obeying parents.
Share a small snack after your lesson that relates to one of the stories you discussed in class. For example, if you studied the story of Jesus feeding the multitude, give each student breadsticks and fish crackers. If your lesson centered on the Garden of Eden, choose different fruits to eat with your students.
Ask each student to draw a picture that shares what they remember from their lesson today. Encourage students to use their imaginations, and avoid making any negative comments. The goal of this exercise is for students to remember what they learned. One student might draw a picture of herself helping a friend cross the street, while another student may prefer to draw a picture of his mom and Jesus. Let your students take their drawings home, or hang them on the wall of your classroom.