Prayer, helpers, Zacchaeus and parables are some sermon topics for children. With a prop or two and some Bible verses, many children's sermons invite the participation of the children.
A cell phone and Luke 11:1-13 to read can teach children that talking to God in prayer is as easy as talking to someone on a phone. Another children's sermon about the helpers that Jesus sent out is based on Luke 10:1-24. A set of car keys and a Bible are the only props needed.
The story about Zacchaeus told in Luke 19:1-10 compares growing children to the little man. Some children's sermons talk about parables from the Bible, such as the story of the son who lost everything he had and decided to go back home. In Luke 15:21-24, the father welcomed his son back home instead of being angry.