http://www.youtube.com/watch?v=pX1ib06WLs8 Start at around 4:40 and go from there. And there's a very interesting Math question for you folks. http://www.youtube.com/watch?v=mwTjKi8PIT8 Where one of the key ingredients of Japanese paper currency is grown.
Awesome video. Here is some related information about the paper used: http://www.kansai.gr.jp/culture_e/washi/appli/index.htm (check the bottom)
