However there is certainly a requirement for imagination, creativity, mathematical knowledge and patience. The challenging aspects of origami require much thought and logic. Actually folding paper is not difficult but depending on the level of origami, completing an entire project can be tough. Origami is an activity that can be learned if the individual is interested. While he was still in kindergarten Hojo Takashi was introduced to origami for the first time. Later when he was in junior high he read the book Viva Origami that showed him the vast possibilities of the art of origami and increased his dedication to the art. Throughout his lifetime he has used the wet folding techniques invented by Yoshizawa and created unique figures with soft curves that have had a great emotional impact of the people who see them. In Japan from the early 1600's through the late 1800's, several forms of entertainment were developed for the common people; origami, now as an art form was one of those entertainments. The popularity of origami was due in part to its simplicity and the fact that there was no need for special tools. The popularity of origami continued to grow through about the middle of the 19th century then, except for ceremonial usage it's popularity started to decline during the modernization of Japan. Some tips for beginners - pick a well lighted relaxing area to work in, start with simple figures and work your way up (some figures will have both simple and advanced instructions for the same animal). Don't use really good paper to start with and for true beginners one of the best pieces of advice is to start with a larger piece of paper than what is called for. The plane needs to be symmetrical which requires the folds and creases to be identical on both sides of the paper airplane. This would likely be considered basic origami. Other objects that can be made with basic origami include a simple box, an envelope and a square picture frame. These projects can be made with one sheet of paper using a limited number of folds. It's amazing what a dollar bill can get you by simply making a few simple folds. There is plenty of available material about origami including books and publications about money origami. If you are interested in learning about the art of origami or are intrigued by money origami, there is plenty of written material circulating.