Turn the metal rod to power the light bulb. The faster you turn it, the brighter it gets!
Twitter-Powered Iran Election Meter
This project took information from Twitter (regarding poster's opinions on the Iran Election) via the IR beamer and displayed it's findings.
Half-Circle Clock project
Because of the servo motor's limited range (0 to about 170 degrees) this participant decided to make a half-circle clock.
Fish-Catching Cat project demo
The cats hand had a magnet underneath it, and the fish had a reed sensor attached to it. When the cat "grabbed" the fish, lights would turn on.