Because children tend to change their minds quite often, choosing origami as a hobby is a smart choice since it is relatively inexpensive. If the child tries it for awhile and decides they don't like it, there is no big concern about the initial investment for materials. To get a child started with origami, using plain computer paper would be a good idea. These creases show definite patterns of triangles, rectangles and other shapes. The geometric study of the crease lines over the last twenty-five years has paved the way for the discovery of new bases. Not all designs are combinations or parts of other bases; some like the box pleat are completely original. Modern origami has progressed to what it is today in great part due to a man named Yoshizawa Akira who in the early 1950's published books containing all new figures. In collaboration with San Randlett, an American, he developed the diagram symbols that are still used today. Today Yoshizawa is remembered as the grandmaster of origami and there are thousands of origami lovers worldwide. This idea was quick to catch on spreading into Spain, South America, Germany and Britain. With time this creative activity also became popular in the west. Although origami is an activity enjoyed by thousands of people, it has a special place in the Japanese culture. Learning how to fold paper is the basis of origami. Complex projects frequently used different types of foil paper in origami. One type, usually sold commercially is foil-back paper. This particular paper is very strong and provides an excellent working base for complex origami. There are also tissue foils that can be used for origami. Tissue foils are usually glued to both sides of a piece of aluminum foil to make a piece of origami paper. 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. It's essential that the person administering help and advice present a non-threatening image.