The Yorozu Audio Sound Revolution from Japantrendshop transforms any flat surface into a functional speaker. Just “mount the Yorozu’s vibrating sonic transducer wherever you want it, and it’ll turn the surface into a conductive sound system.” Product page. Video after the break.

While the kit includes a cardboard milk carton that you can use for starters, pretty much any piece of cardboard, a window, a plastic water bottle or even a white board will work.

[via TechnabobJapantrendshop]