An input device for interfacing with a computing device is provided. The input device includes a body configured to be held within a human hand. The input device includes a light emitting diode (LED) affixed to the body and a power supply for the LED. A mode change activator is integrated into the body,...http://www.google.com.au/patents/US20040207597?utm_source=gb-gplus-sharePatent US20040207597 - Method and apparatus for light input device
