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Cool > Thursday, July-12-2007

Instant sand



Here’s a cool demonstration about how some special sand expands from a tiny amount to fifty times it’s own size. Pretty cool! Instant sand!

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Comments for Instant sand

Untitled

That's sodium polyacrylate, a polymer used in diapers to absorb liquids. It's adsorbancy is amazing, but you can get it pretty readily.
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