Weberence.com

Jason Krugman, Stella Kim and Ben Chao have created a set of huge testicles, hung from the ceiling, that react to human touch. The Teste Touch, as it is called, has a built-in temperature sensor that responds to heat as real testicles do. When it comes in contact with something cold the “balls” shrink [...]

Students from British Columbia, Canada, presented a very interesting idea regarding the interaction with Wall Displays. Since we would need a ladder to interact with a gigantic touch screen wall display, they invented Shadow Reaching.
It seems very interesting, although it might have some problems in the presence of strong light.
See the video.