Many of these origami compositions are displayed in art galleries. There's enough interest in this activity that there are origami competitions held. Individuals who are really skilled and serious about origami work quite hard to design and create complex objects to be showcased and judged at competitions. Some of the objects that have been successful created using money origami are a spider, a butterfly, a shirt, a sailboat, a ring, a serpent, a valentine, just to name a few. What would cause a person to begin money origami? It could be a number of things. Perhaps while sitting in a restaurant waiting on the waiter the customer pulls out a paper bill and begins playing around with it. There are countless projects that can be done using the art of origami. For people who are working with these techniques on a regular basis, the possibilities for creations rely on their imagination and creativity. Although the finished products are elaborate and obviously a challenge for the inexperienced person, the art of origami often uses two basic folds - the origami bird base and the origami square base. Educators and teachers are using origami in the classroom. This activity has proven to be effective in teaching children to be patient and attentive. Both of these skills are necessary in a group as well as in every day living. Origami also teaches children about problems solving and other aspects of mathematics that are relative to life. Teachers around the world have used origami to teach different concepts in chemistry, physics and architecture as well as math. Origami construction is defined as the folding of paper using the raw edges, points of the paper and any creases or points subsequently created by those folds. The folded paper is seen as both an art piece and a geometric form. Origami paper can also be bought with both sides colored (usually two different colors) and with designs and patterns on it. 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.