Okay kiddo, Charlie Hebdo is a newspaper from France that makes funny drawings and writes silly stories about important people and topics. Sometimes they make fun of important people like the President or famous actors. They also sometimes make fun of religion, which is a topic that some people take very seriously.
Unfortunately, some people got very angry at Charlie Hebdo for making fun of their religion and they decided to hurt the people who work there. They even went to the office of Charlie Hebdo and started shooting the people who work there. This made a lot of people very sad and angry, and it was a big tragedy for France and for the world.
But even though some bad guys tried to hurt Charlie Hebdo, they never stopped making their funny drawings and stories. In fact, lots of people around the world started buying and reading Charlie Hebdo to show their support for the people who work there and to stand up for freedom of speech. And that's why Charlie Hebdo became very famous all over the world.