Jᴀᴄᴜʀᴜᴛᴜ - Tʜᴇ Cᴀsᴛ Oᴜᴛ

This is quite awesome: Acoustic Tweezers

(Plus I thought you'd like this Thing.)

Neat, I actually have a friend who just got a grant to go on a research retreat and study how sand on a plate (square or round) will form wildly differing and complex patterns (spiderwebs, scales etc) depending on what frequency you resonate them at. I would guess that this is using similar principals.