Jacob’s Ladder Image Flip

Available from this shop in Spain: 
From Punto Verna: Reproduction Jacob's Ladder 

A much less expensive version available here (poly-wog to frog) 
Amazon: BUY NOW Wooden Visual Illusion Blocks Science Educational 

Classic versions of this toy available here: 
Amazon: BUY NOW Jacob's Ladder Toys 

The same ribbon hinge mechanism is used to make the "magic" wallet click here

Jacob’s Ladder Image Flip: with a twist of the wrist this reproduction flips back and forth between an image of Queen Victoria and that of Prince Albert with a satisfying click-clack sound. The earliest description of the ribbon hinge mechanism that creates this kinetic illusion of cascading blocks comes from a magazine article in Scientific American in 1889.

Jacob’s Ladder Magic

This classic toy available here: 
Amazon: BUY NOW Jacob's Ladder Toys 

The same ribbon hinge mechanism is used to make the "magic" wallet (Click here for magic wallet). 

Jacob’s Ladder Magic: disappearing coins demonstrate another non-intuitive aspect of the hinge mechanism of this classic toy. The earliest description of the ribbon hinge mechanism that creates the kinetic illusion of cascading blocks comes from a magazine article in Scientific American in 1889.