This is a display technology designed to mimic paper.
The most important feature is that it retains its image without power and only needs power to flip to another page.
There is a lot of effort underway to make 'e-paper'. It is a tough challenge but some progress is being made by companies and research organisations around the world.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: E-paper