The act of adding something extra on top of what is already there.
Superaddition can make people think of making things better or adding more than is needed.
Examples:
The superaddition of sprinkles made the ice cream even better.
I made a superaddition to my drawing by adding a sun in the corner.
The superaddition of a cape made the costume super cool.
The superaddition of a hat to the dog's outfit made everyone laugh.
The superaddition of a hundred balloons made the party super fun.
The superaddition of a secret ingredient made the cake super delicious.