You show three Giant sized cards to the audience. Two Queen of hearts and an odd card. You shuffle the three cards right in front of the audience and ask them to choose the Queen of hearts. That is you give them a two out of three chance. But no matter which card they choose it turns out to be the odd card. You can fully show all the three cards to be the odd card.
These are giant sized cards with each card measuring 11" X 8". There is no sleight of hand involved. Very easy to do.