According to the Book of Genesis in the Bible, after the Flood people again began to get wicked. Then they had an awful idea. They wanted to build a tower that would go all the way up to Heaven. They wanted to be famous. These people called their tower Bab-el, the Gate to God. (This is a different version of the word “Babylon”, which means the same thing.)
The Jews hated Sumerian ziggurats, and probably those ziggurats inspired this story. The ziggurats were built with very much this idea in mind. People wanted to reach for the sky. They wanted to get as close to the gods as they could, so the gods would hear their prayers better. And they wanted to show off how good they were at building. Sumerian gods apparently appreciated the effort.
But in the Jewish Bible story, God hates this idea. So he wrecks the tower with a bolt of lightning. God also makes everybody speak different languages, so they will not be able to cooperate on big projects like this anymore. In Hebrew, just as in English, God makes the people *babble*.
The story of Babel is related to a Sumerian story in the Epic of Gilgamesh where Enlil, the chief of the gods, is annoyed by all the noise people make. He can’t sleep. So he sends a flood to kill all the people, as in the Bible story of Noah.
Learn by doing: work with a team to build a big sand castle or block tower and knock it down.