When I initially envisioned the story, it was going to start with the third image. I figured that everyone would know the story, so I wouldn't need to put the first part. But when I showed the story to my writing group, they all thought that small kids might not know the story as well as I was assuming, so it was better to tell it briefly.
The good part about that was that it gave me an excuse to do a painting of the Gingerbread Man bursting out of the oven. And the animals chasing him were fun too.