This is a highly-scaffolded creative writing task in which students discuss the idea of 'miniature worlds' (doll's houses, model villages, snow globes, Lego, dioramas, ships in bottles, etc.). They are then given the choice of two imaginative scenarios as the basis for the beginning of a short story.
I have found that students are much more successful and comfortable writing in response to prompts when they do not have to think about how to resolve a complete narrative. Hence this task explicitly asks students to only write an orientation, complication and rising action, rather than a whole story. This allows the teacher to focus on other aspects of creative writing, such as descriptive language, dialogue, show-don't-tell etc.