I read about the Thaumatrope, I remeber working on them in seminar, They are known as a turning marvel ,or a wonder turner. The reason is because you make one circle with two different pictures like the top picture as so, then attach string (or elastic band) then twirl it, it will give the effect of the two pictures together. Like the example above, the illusion will be the dog chasing the birds. The negative about this, is that there are only two frames, that can give motion or not, like a bird in a cage, or a dog chasing birds. Then merges the two images, giving the illusion of one, so you can't actually create motion with this form of animating.

Then in 1832, they invented the Phenakistoscope, which revolutionized the animating world.