How to turn one card into another

With this technique, you can turn one card into another or change its suit. For example, you can turn the king of spades into the king of hearts. To do this, you only need to change the sign in the corner of the map. This can be achieved if you use a dual card. In this case, cut out the part of the middle side, on which there should be a sign. The back map should be glued to the front only at the edges, it is completely white and only in its upper corner is a sign, for example, a peak. In order for the sign to be visible, it is necessary to make a hole in the top card, and thanks to this card can change its suit.
You can use another way to replace the card. Between the two cards there is a movable plate, which is driven by a pin that passes through the back side, on which (in view of the plate) a sign of the heart is drawn. If this plate is set in motion, then the sign of the heart is placed opposite the hole that borders the peak. Thanks to this card looks like a worm king.