Handmade origami elastic deformation ball is a very interesting spherical structure. After folding the flat paper in this way, it can be bent arbitrarily in one direction. ?
When no pressure is applied, it can be a cylinder. And when pressure is applied on both ends, it can turn into a round sphere or an oblate sphere. How about it? Don’t you think it’s interesting?
Cylinder structure when no pressure is applied.
It looks a little like a pumpkin again.
Illustration of origami explanation of bouncy ball.
Large bouncy ball work.
Creased paper.