Ok here is some pics on how to make a almost unbreakable knex block/box
It's strong in certain directions but is easily bent and broken in others. I'd recommend making the most of triangles in your design, perhaps transferring some force to the other sides by bracing through the center of the design, and of course making the pattern regular on all 6 sides.
I cant do it on all sides but a can make it stronger with a soon to come update <br> <br>

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More by EpicCraftMan:The invicible Knex Block How to make Slime with easy to find items 
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