This simple toy demonstrates the principle of "persistence of vision". As you move the bow drill the refill spins and the images of the bird and the cage mix and we you the illusion that the bird is encaged. ...
by raging unicorns
by Amma Arts
by BRIA CRISTA
by Maricita Colours in English
by mithilaconnect
by Cauvery's Crafts Studio
by Cool Origami Tutorial by Yakomoga