The most times a piece of paper can be folded in half is 13 times.
In 2011, teachers and students at St. Mark's High School in Texas, USA, folded a 13,000-foot-long (nearly 4 kilometers) piece of toilet paper 13 times, and to complete the experiment, they placed the paper in more than 200 meters of corridors at the Massachusetts Institute of Technology and collectively folded it for more than four hours. After folding 13 times, the toilet paper reached 8,192 layers.
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For children, origami can exercise their finger dexterity and develop their hands-on ability and creativity; origami must be done step by step, and in the process, children can also develop the good habit of doing things step by step and in order, and also cultivate their observational power and attention.
Paper folding, because of its plasticity, can develop children's creativity, imagination and image thinking ability; objects in life, small animals, transportation, etc. are turned into figurative origami, and in the process, children's spatial imagination ability will also be improved.
For the elderly, origami games can help them to develop their brains and active thinking, so as to achieve the comprehensive coordination of the hand, eye and brain, and can also prevent memory loss in the elderly. Some nursing homes use origami as a therapeutic way to rehabilitate their patients
The art of origami has led to the development of "origami math," which uses equations to prove that any kind of geometric form can theoretically be simulated with origami. With the aid of computer software, origami researchers are now able to create more complex shapes than ever before. Japan's Tetsufumi Kamiya, who folded a dragon with scaly claws out of a 2-meter-by-2-meter square of paper, is said to be one of perhaps no more than 20 people in the world who have done so.
On the other hand, modern origami is no longer just an art, but has developed into a new science: origami math. It's been used in parachutes, solar panels for artificial satellites, airbag storage methods for cars, and even the structural design of the Hubble Space Telescope, all thanks in part to origami math.