In a pickles children story, one important element is the discovery. Maybe the children discover a new way to eat pickles or they discover that pickles can be used for something other than just food, like making a pickle - powered toy. The characters' personalities play a role too. If there is a shy child who is hesitant to try pickles at first but then becomes a big pickle fan. Also, the plot might involve a mystery around the pickles, such as where did the super - delicious pickles come from.
One possible 'pickles children story' could be that there are some children who enter a competition to make the best pickles. Each child has their own secret recipe and they learn about hard work, cooperation and the joy of creating something delicious. Along the way, they also learn about the history of pickles and how they are made in different cultures.
It is not appropriate at all. The Incredibles franchise is about heroism, family values, and adventure. Fanfiction should stay within the boundaries of the general theme of the original work. Sexual fanfiction about these characters not only distorts the essence of the story but may also make many fans uncomfortable.
It's quite rare to find a short story with a book cover related to pickles. Most short story covers tend to focus on more general themes like the mood of the story, the main character, or a key event. But perhaps in a collection of humorous or food - themed short stories, there could be a chance of a pickle - related cover.