DIY Removable Wallpaper
Essentially, you soak a fabric that you like in starch, then apply it to the wall. Incredibly, it stays and looks beautiful. Even better, when you're ready to remove it, you simply pull it off and wipe down the wall.
You must check out these examples!
http://funcheaporfree.com/2014/02/diy-removable-faux-wallpaper/
http://vintagerevivals.com/2014/09/diy-temporary-fabric-wallpaper