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 Pratima Fine Arts And Crafts
by Apurva Creation
by Easy Origami
by TheDIYGirl
by RecipeLion
by HANDMADE ELEN
by Polymer Claus