Getting students to narrate stories is a challenging task especially if you are teaching them Spanish or French. I have found it is best to start with one sentence stories and work on that until they build some confidence and a feel for using the two past tenses.
Story in 30 Seconds OR LESS is all about telling one sentence stories, but thinking about what you are implying as the narrator. The diagram shows them what to do, but your students have to apply the language as they have acquired it. It is a great practice you can use in speaking or writing practice and you can add prompts to it if you want.