Before continuing with the next two steps, keep in mind that the chorus and verses are not entirely necessary for children; this may be considered a more advanced step. If you use a melody like Twinkle Twinkle, Little Star, you won't have to worry about the distinction between chorus and stanza. If the song has a purpose, children will be more motivated to write and sing it. Consider what you tell children and the issues they are asking themselves about.
Try to answer one of them with a song. To write songs and poetry, children need something that matters to them. It can be as big as an elephant or as abstract as your favorite color. Either way, guiding them through the process is just a matter of encouraging them to think about why they like or dislike something.
The ultimate goal is for them to use the writing process to explore how they feel. 26% use the final product to express how they feel. My 8-year-old daughter loves to write songs (she is currently taking violin and piano lessons) but I don't know how to help her.