Paper Money by Mark Leveridge

You show a piece of white paper on both sides and fold it into a neat package. Instantly and visibly the paper turns into a banknote which can be unfolded, displayed on both sides, and importantly, can be immediately handed out for examination or be spent. Devised in the early 1980s, this version of instant money printing is totally practical and very magical. The fact that the printed note can be examined is a huge plus and helps to increase the effectiveness of the illusion.