The traditional concept of origami (from ori meaning “folding”, and kami meaning “paper”) is folding paper to create objects using only one piece of paper with no cuts or glue. Origami started in the 17th century AD at the latest and was popularized outside Japan in the mid-1900s. It has since then evolved into a modern art form. Although origami art has unlimited possibilities, most models generally begin with a specific type of base (fish, bird, waterbomb base) from which the rest of the model develops. As well, there a variety of folds employed in creating these models, ranging from the simple (valley, mountain) to the more complex (sinks, swivels). Together, the bases and mixture of folds combine to produce models that represent everything imaginable.