PingPongPixel is simply a gigantic image display device, built from over 8000 pingpong balls in six different grey tones that together form an image. The display measures rougly 2 by 3 meters, with a resolution of 45 times 60 pixels and a refresh-rate of once per 2.5 hours (or 0.0001 Hertz). It weighs over 500 kg and was exhibited on several occasions around the globe.
The installation was shown at several festivals around the world, and won a 2006 Japan Media Arts Festival Award. Read more on the project website.