Check out the April winning entry in the grade 6-8 level.
Put a Sock in It
Once there was a little old lady who had (so she thought) the best tomato soup on the planet. However, when she would have guests, they would always disagree and say how bitter the soup would taste. One cold night, she thought that maybe she should add a secret ingredient. She added the ingredient, a dirty cotton sock, to absorb the bitterness. Then after that when she would have guests over, their faces would light up at the scrumptious taste of the soup. They had nothing to complain about now because their moths were too full to talk about the sock soup. That is how the saying "put a sock in it" came to be.
"Put a sock in it" is originally a British phrase from the 20th Century used when someone is being loud or noisy. "Put a sock in it" means 'stop all talking, singing, and shouting.'