Controlling The Nile River

The Nile River was very important to Egypt.  I choose this because the Egyptians learned how to take control of the Nile River to help them farm their lands. They were smart and developed a calendar with 365 days to help them predict when the flood would come.  Today we still use calendars with 365 days in it so that development was very important.  Because they could control the Nile River they could grow lots of food and because they could grow lots of food they did not have to work so hard to not be hungry so then they could advance society by building things.  

To display this I would have a map on the wall of the Nile River to show how long it is.  Maybe a remake of a Nileometer that people can see and touch.