Papyrus

A long time ago when Egypt was growing they discovered Papyrus which is a plant they could use to make paper and write on.  I chose papyrus because we get our word "paper" from it. Discovering how to make and write on papyrus advanced civilization because they didn't have to use stones anymore.  They could start writing stories and keeping records of important things on paper and they could roll it up in scrolls and store it easily.    

To display this in a museum I would maybe have an actual papyrus plant in a pot nearby.  Next to the pot, maybe have a table with a scroll and some ink.  To make it really cool, maybe people could actually write on the scroll to see how it looks and feels.