This morning I've used this story with my kids. It is taken from "The teacher's magazine" - which I recommend to all ESL teachers.
I've scanned the 8 pages of the story, added sounds and effects and it ended up in a very nice power point presentation.
If you want, you can download it by clicking on the image.
With this story you can explore the adjectives "huge" - "Tiny" , "Big" - "Small"... As well as the morality of the story which is : "No matter how different we are, we can be good friends"