I found this image online sometime ago and no longer have the link. No matter. I have also come across something like this in real (not virtual) life. Many year's ago, a friend's daughter had a set of these interchangable strips. They can be placed in any order to make a single landscape image. Based on nine strips, I calculate that there are 362,880 different combinations (to the mathematically-minded, that is, 9!) - unless I am much mistaken.
So far as I can ascertain, this seems to have been a Victorian children's plaything. With so many combinations, it must have keep the imaginative Victorian child entraced (and not heard) for hours - if not into advanced old age!
