When you snap the card inserted into the deck with your finger, it changes to another card.
It can be used not only for color change, but also for the appearance and disappearance of signetures and changes the card face to back or back to face.
Moreover, you can hand the card after change to the spectators!
And you can show both sides of the deck to spectators that there are no cards before the change with spread.
The following materials are necessary to make this gimmick.
· 4 cards
· Elastic thread
· Other tools such as scissors and glue

DIY manufacturing skills are needed to make this gimmick.