It could be about family bonds.
The theme might be the closeness and special connection between siblings. Since it's about being 'in the sister's belly', it could symbolize a return to a very primal and protected state within the family, highlighting the deep - rooted relationship and the sense of security that comes from the sister - brother or sister - sister relationship.
I'm sorry, I haven't read this story so I can't summarize it directly.
It could be survival. Maybe the person in the story had to face numerous challenges that put their life at risk, and the whole day was about trying to get through those difficult situations alive.
The 'big belly deviantart story' could potentially be related to an art piece or a series of art pieces on DeviantArt that feature a big - bellied character. It might be a humorous story, a fantasy story where the big belly has some sort of significance, like a magical storage or something really strange. Maybe it's also a part of a more complex narrative about acceptance, where the big belly is not the norm but is being presented in a positive light. However, again, without clear details, this is all speculation.
Another theme might be the power of imagination. The story could show how the little sister's vivid imagination creates this entire world full of magic and mystery. She might use her imagination to transform a dull day into an exciting adventure, and the story could be about how important it is to have an active imagination in our lives.
I don't know the actual 'day 275 word story', so it's hard to say. It could be about love, adventure, or mystery. There are so many possible themes.
It could be friendship. Many short stories revolve around the theme of friendship.
Perhaps the theme is about discovery. If new words were added each day, it might be like the discovery of new ideas or elements in a story. The story could be about a character exploring a new world, and each day's word represents a new discovery within that world. For instance, if one day the word was 'mystery', then a mystery element could be introduced into the story's plot.
The theme might be about self - discovery. The story could be about a character's journey within themselves over the course of the 1385 - word narrative. They might face challenges, learn new things about themselves, and ultimately grow as a person. For example, they could start off feeling lost in life and through various experiences described in the story, find their true purpose.
Since I don't know the details of 'day 209 word story', it could be any theme. It might be a love theme if the word was something like 'heart' or 'affection'. Or it could be a adventure theme if the word was 'journey' or 'explore'.
Since we don't know much about the 'day 420 word story', the theme could be quite diverse. It could be a story centered around nature if the writer spent a lot of time outdoors during those 420 days and was inspired by the beauty of the natural world. It might also be a story about perseverance, especially if the writer faced difficulties during the writing process or in their life during that time. Or it could be a humorous story, perhaps the writer used the 420 days to come up with comical situations and characters.