In one way, this seem more like an artistic sculpture than a silly prank, but unless you're making food and drink art, this will always be a prank. Learn the spilled coffee prank, outlined in this how-to, which involves a little bit of Elmer's Glue. Place this over someone's secret and important documents, and they'll absolutely go apeshit!
This is perfect for a quick office gag, no matter if it's April Fool's Day or not.
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