This website uses cookies, which are necessary for the technical operation of the website and are always set. Other cookies, which increase the comfort when using this website, are used for direct advertising or to facilitate interaction with other websites and social networks, are only set with your consent.
You show a card with holes drawn on by a sharpie pen. With just a wave of the hand, the drawn holes become real and you can pass your hand behind the card to show that the holes are real.