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Step 1: Setup the Cube
You need 64 neodymium cubes (could be more or less, for example: 52 if you subtract 1 of every edge).
Then you need to conform them as squares and shape something similar as the image (pod), joining the edges of "p", "o" and "d".
After that, try to magnet the sides having 90º of curvature between one and the next.
The result would be a 3D Hollow Cube of cubes as you can see in the video. Want to stick paperclips and staples? Now it's possible.