http://en.wikipedia.org/wiki/Mobile_phone_charm http://en.wikipedia.org/wiki/Mobile_phone_charm I think one of the ones that "flash and light up when the phone

http://en.wikipedia.org/wiki/Mobile_phone_charm http://en.wikipedia.org/wiki/Mobile_phone_charm I think one of the ones that "flash and light up when the phone rings" would do the trick for you. At least that is urban legend among people who need that kind of warning as I understand it. Edit: ThinkGeek sells one... http://www.thinkgeek.com/product/a150/ http://www.thinkgeek.com/product/a150/