Also since every folder has a slightly different touch and technique an artistic origamist's piece would be almost impossible to duplicate. Many of the Origami models back in the Edo era were made possible only due to the use of Washi. Washi is a very strong Japanese paper, which unlike the western papers didn't tear easily when being folded. With the aid of computer programs using intricate mathematical theorems origami has become as much a puzzle as a piece of art. Mathematical origamists are now designing more and more complex, realistic models still sticking to the simple rule of one sheet of paper with no cuts. These programs are also used to solve problems involving getting large pieces of paper folded to fit a specific sized flat surface. It's important to have goals in life and it's great that an activity such as origami can help a person learn about it. Origami provides an opportunity to relax and have fun. The enjoyment that goes along with this activity is definitely good therapy. Not everyone is quick to open up and share their feelings with another individual, even a psychologist or other medical professional. Instead of visiting the gift shops and spending money, you can sit back, play with your money and save in the process. Money origami may not sound very interesting to some people but to others it is quite fascinating and a reason to continue looking for new objects to make with their money. For people who are familiar with the art of origami, money origami is not a new concept. There are hundreds of sites filled with valuable tips and advice about choosing and completing origami projects. There are sites which provide free origami diagrams and instructions for you to download and print. There are sites where you can buy origami materials and order books written by serious origamists. It allows the individual to devise their own plan and create a plan of their own to achieve the final outcome. Origami expresses individuality when an artist chooses to use different papers and colors. Although a project might be similar in style to another, it can be made unique by using alternate techniques for example, by using wet folds instead of dry folds.