Clairvoyance by Dr. butcher

You give a spectator a cloth bag with 5 plastic cans. - As you turn away, the spectator opens one of the cans and puts a note or banknote inside.

The closed container goes back to the others in the bag. Now you get the bag. You reach in and pull out a can. Of course it's the viewer's!

Many variants, also with other objects are possible. German brief instructions.