Playing with a flip book gives you that primordial joy that goes to the heart of not just what animation is, but perhaps cinema itself. Shown above are but a few samples (click on the image to see it at full size) from the amazing website flipbook.info:
"Welcome to FLIPBOOK.info, a website entirely devoted to an art form half way between book and movie. We have a collection of 4420 flip books (also called flick books or folioscopes) from 1882 to nowadays with a great diversity of topics."
Below is another amazing cover that I came across, it's from a flip book published in 1972 based on the French comic Placid et Muzo:
Found via Linkfilter.net.