Perhaps in your course you could take this a little further, and talk about the difference between writing poetry, and trying to write a story in verse? I find that the discipline of writing poetry, specifically lyrics, is a very good exercise for expressing one’s thoughts in a very structured format, keeping the emphasis on the correct syllables (this can be very glaringly awkward in a song, if the unaccented syllable of a word falls on an accented note), being concise, rhyming without resorting to odd grammatical contructions, etc. This, however, is *very* different from trying to tell a story to a child while maintaining rhyme and rhythm.