Origami (折り紙) is the art of folding paper into different shapes without using glue or scissors. Common folding objects include animals, flowers, balloons, planes and boats. Most popular among them, the crane is a symbol of longevity, and it is said that folding one thousand cranes can make a wish come true. Therefore, one thousand cranes are customarily given to sick people to wish them a fast recovery. In addition, the crane has became a symbol for peace. As such, large number of folded cranes are laid down beside the monuments that remember the atomic bombs in the peace parks of Hiroshima and Nagasaki.