4 Steps to the Perfect Sandcastle!

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SOURCES:
https://www.theguardian.com/lifeandstyle/2009/aug/01/how-to-build-perfect-sandcastle
https://www.scientificamerican.com/article/how-to-build-the-perfect-sandcastle-according-to-science/
https://indianapublicmedia.org/amomentofscience/wet-sand-stick-together/
https://www.livescience.com/9375-sandcastle-physics-revealed.html