Overcoming obstacles is another theme. Like in the story where a fat kid is bullied for being overweight but then finds a way to shine, either through a talent or by being kind. They face the difficulties of being different and rise above them.
One sad fat kid story could be about a kid who gets constantly bullied at school because of his weight. Other kids make fun of him during gym class or in the cafeteria. He feels so alone and sad, but doesn't know how to change the situation.
The fat kid is sometimes portrayed as a jolly character. They are the ones with a big smile and always seem to have a positive attitude. They might be the class clown type, using humor to get through the day and make friends. Like in some coming - of - age stories, they are the ones who can always make others laugh when things get tough.
A fat kid I knew was at a birthday party. When it was time for the piñata, he swung the stick so hard that he spun himself around and fell over. Everyone burst out laughing. He just got up, dusted himself off and tried again with a big grin on his face.
There was a fat kid in my neighborhood. He loved baking with his grandma. Once, they entered a local baking competition. The fat kid was initially made fun of by other contestants. However, his and his grandma's delicious cake won the first prize. It taught everyone not to judge by appearances.
One 'fat kid inside story' could be about a child who always had a big appetite but was shy to ask for seconds. So they would secretly steal extra snacks when no one was looking. It was their little adventure to satisfy their cravings.
There are no appropriate or ethical 'castrating a fat kid stories' in mainstream literature. Such a topic involves extreme violence and harm towards a child, which goes against moral and ethical standards.
I'm not sure who the main characters are exactly, but I assume there is at least the 'fat kid' as a central figure. There might also be family members like parents or siblings who play important roles in his story.