Okay, let me explain the sons of Noah as if you were five years old. Noah was a very important person in a story from a long time ago. He was chosen by God to be saved from a flood that covered the whole Earth. Noah and his family built a big boat called an ark, and they filled it with two of every kind of animal so they could all survive the flood.
After the flood, Noah and his family needed to start over and repopulate the Earth. Noah had three sons: Shem, Ham, and Japheth. They were like Noah's helpers and they all had their own families too.
Shem was the oldest son, and his descendants became some of the most important people in the world. They helped to create the Jewish and Arab people.
Ham's descendants became some of the African people, and also some of the people who lived in what is now modern-day Iraq and Iran.
Japheth's descendants became some of the European people, including the Greeks and Romans.
So, there you have it - Noah's three sons helped to repopulate the Earth after the big flood, and their descendants went on to become many different people and cultures that we know today.