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[Intermediate] How to fold a cube that does not have any creases or folds on any of the faces. This is my version of the classic cube from a 4X4 grid which was independently designed by Kazuo Haga, Kunihiko Kasahara, John Montroll and Jacob Ewing, all of whose cubes slightly differ but share the same basic structure and locking mechanism. I also designed a seamless octahedron and taught it here: youtu.be/rc5EGPo4Op0
The final closing of the cube is a little hard to follow in this video, so I did a redo of just the final part: youtu.be/_Zq5mqZ2IwI