A traditional paper crane is a feat of artistry. Every fold in origami leads to the transformation of a single square sheet of paper into a bird, a dragon, or a flower. Origami discourages gluing, marking or cutting the paper, but in the art of kirigami, strategically placed cuts can transform the shape of the paper even further, creating complex structures from simple slits. A well-known example of this is a pop-up book, where depending on how the flat paper is cut, a different set of shapes—a heart, a frog, a set of skyscrapers—will emerge when the book is opened.
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Source: Phys.org