Okay, so imagine that there is a really big party that happens every year in Germany. This party is called the Cologne Carnival.
During this party, people dress up in funny costumes and march through the streets of Cologne. People also have big parades with decorated floats and big bands playing music.
There is also lots of food and candy to eat, and people throw confetti and small toys into the crowd.
This party happens every year before Lent, which is a time when some people give up things they really like to do or eat to show they are sorry for things they have done wrong.
So, the Cologne Carnival is a big celebration before this time of sacrifice. It's like a big party for everyone to have fun together!