I had a Girl Scout Dance coming up Sunday and I was thinking how I would get 150 six to nine year old girls to know which hand was right and which hand is left.  On the way to my contra calling gig on Saturday, the thought arose that right hand sounds very close to red hand.  On the way to the Scout Dance, I stopped and purchased scissors and some red ribbon (the store did not carry yarn) and asked that the leaders tie a red ribbon bracelet around each scout as they entered the hall.  When I called dances with arm turns I called, "Turn your partner with your red hand, change hands, other way back."  It worked so well that I know I will do it again.