The magician shows a set of white cards to the audience and thus he flips through each batch of papers so the audience can clearly observe that the set of cards are fully white cards. At this point, suddenly, when the magician shows the paper to the audience again, as soon as the magician shakes the cards, they turn into banknotes. The magician can show the audience every single card that has been turned into a banknote.
Following of the show, once again, the magician holds the banknotes in hand and with one shake of the banknotes, they were changed and turned into another banknote. Eventually, the magician can show each piece of them to the audience...