Vibrating rings

I missed this recently. What a cunning idea!

Two vibrating rings which can guide the wearer around a city via global positioning satellite (GPS) have been unveiled by a British designer at the Royal College of Art...Gail Knight. ...The rings buzz for left and right, and have different vibrations for forwards and backwards. Both buzz when going in the wrong direction. (link)(via The Goat)

Well done, Gail.