It is a kind of toy that was invented in 1820 to amuse children but it has the illusion of movement. You can make it and have fun in order to see the magic of movement. Also you can feel how animation works.
To make it you just need two round stiff board and a string. Draw a picture for example a cage on one and a bird on the other. Pass through the string between two boards and stick them together. Now flip it quickly. You will see the bird is in the cage!