Hourglass full of magnetized "sand" |

This $14, 100-second hourglass is filled with magnetized iron filings that form beautiful fans and other shapes as the sand drains into the bottom bulb. (via Canopy)
http://feeds.boingboing.net/~r/boingboing/iBag/~3/yWJmf75DxCo/hourglass-full-of-magnetized.html
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