What is the name of that wallpaper that you can put on and take off at will?

i remember watching a shopping channel one time and they showed a wallpaper that you could put up and take off whenever you wanted. my room is painted with a winnie the pooh theme that my grandma did and she died now and i don't want to put anything up over it but i'd still like to have something different up. if you could tell me the name of that wallpaper or direct me to something similar i would be very thankful