How about using something like a play house felt board that shows people and furniture and household items, and use it to teach them the names of household things, rooms, or prepositions or adjectives? It doesn't sound like it needs to be a "story" really but just using the flannel board. With the play house one I think older students would really enjoy it and it is something everyone can relate to and understand visually. Story Time Felts makes the one I am thinking of. Another one would be a farm, and you could teach them using the animals. Even if it feels childish, I've found that it's fun to bring out the child in older students. Have fun with it!