I came across this web site called, "String Rings"
"The String-Ring™ is a cue to remind yourself, and those who notice it, to be kind to one another. To do a kind act, or even think something kind. Designed to be threaded with the provided colored string, String-Ring reminds you of the particular act of kindness you wish to remember. Each String-Ring™ is crafted from the best quality silver and comes with 20 replaceable colored strings, a jute bag, polishing cloth, stickers, and a list of color meanings."
I think that it's a really good idea - we all (myself included) need to be reminded to be kind.