A little scary but still very interesting is the FaceBank - a money box with a face and a mouth. When you want to put a coin in it, just feed the mouth 
which will eat the coin! A very nice view to look at.
Designed by Japanese designer Takada ,the eyes of the FaceBank are actually sensors. You can activate the FaceBank by waving at it and it will eat all your coins!.
A nice idea to freak out your friends.
It costs $40 and can be bought from here.
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