This is a devious card routine you will love to perform. A lot seems to happen and it is almost impossible to back-track all the magic. It will fool any magician that is not familiar with it.

You spread a blue deck of cards face up between your hands and ask a spectator to point to or name any two cards they see. You place the two cards on the table, you then ask a second spectator to name any other card (free choice). Say they name the Five of Clubs. 

Explain that before you came here you randomly removed two cards from a red back deck, wrote something on their backs and shuffled them into the blue deck. You now spread the deck showing that all the backs are blue (as they should be). But when the two cards that were previously selected are turned face up they are seen to have red backs and the writing on their back reveals the freely named selection.

Manufactured by Magic Inc. Comes complete with a special deck of Bicycle cards and written instructions.