Orbduino is very similar to the Live Robot Control that I added earlier. The difference, is that Orbduino runs on a Arduino and is simplified, yet has more features. It is 100% open source (Thanks Bill Joy!). It lags a bit and doesn’t have as precision control as LRC, but it’s great for playing around. Some people have made some pretty cool creations and apparently if you hit the target with something, something special happens. If you succeed, comment what happened because I don’t know.