This clever little money box was bought in 1991, and it was made by the TOMY Toy Corporation of Japan. Place a coin in the little slot, just in front of the watching monster. When you are ready, push the coin down, and it immediately appears in the monster's grip. Push the lever down a couple of times, and the monster munches on your coin, and then swallows it.
The money box contains a clever illusion - you are not seeing the monster directly. Instead you are seeing a reflection of the monster, and also once it is holding the coin, that is also a reflection. In reality you are looking into a curved mirror.
So, not only is it all done with mirrors. But in this case, the money is also an illusion!