V.V.S.Acaan (Very Very Simple Acaan) by Ludovic Villain

Show a deck of cards to your spectator and ask him to name any card.
Tell him that before you met him, you have shuffled the deck of cards 
Tell him that you are able to tell him what position his card is in the deck.
Take the cards out of the holster and ask the spectator to count the cards and look at the card corresponding to the number you announced a few seconds before.

this version of acaan is perfect for beginners
No manipulation
No glue
no flap
no magnet
no thread