Remember doing this.wrap your boyfriends class ring with string so it would fit your finger? Or else made a wad of tape, covered with finger nail polish, to fit between the ring and top of finger. (The girls I knew used angora yarn)
If you were alive in the chances are you had a mood ring or saw one. Mood rings are rings with a stone that changes color, supposedly in response to your emotions. Here's a look at how mood rings work and whether they really can tell how you.