The International Olympic Committee (IOC) is like a big group of people who are in charge of a really cool event called the Olympic Games. They make sure that all the countries around the world who want to participate follow the same rules and play fairly.
Imagine you're playing a game with your friend, and you both have different ideas about how to play. The IOC is like the referee who comes in and says, "Okay, these are the rules we're going to follow so that everyone can have fun and play together."
The IOC is made up of people from all over the world and they work together to decide which cities get to host the Olympic Games. They also make sure that the athletes who compete are treated fairly and that they follow the rules.
So, if you want to go to the Olympics one day, you'll have to follow the rules set by the International Olympic Committee!