You fan four cards, showing them to be of the same denomination. You show the backs of the cards to be blue. As you pass your hands over the cards they visibly change to a new card. All is not done, for when you turn the cards around, the backs are now RED. This can be done over and over again with no setup.
Comes complete with everything you need€¦
The world's greatest card trick.
Regular deck Of Bicycle poker-sized playing cards.