Unexplainable or Not: Beach day!
Unexplainable
How to Build a Tiny Sand Castle
The tiny tunnel is a way to test that the force is still sort of working. The stickiness of this like capillary force can kind of like pull water up a tube. They were so delicate and so hard to make, it takes more than three years time to finish. So theoretically, you could build the world's tiniest sand castle.
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