This has long been one of my favorite parlor/group games. All you need is a group of people and a pair of scissors. The leader begins by telling how s/he received the scissors-either crossed or uncrossed-and how s/he will pass the scissors-either crossed or uncrossed.
The object of receiving the scissors crossed or uncrossed is based on your leg position. If you received the scissors with your legs crossed, then that is how you received the scissors. If you pass them with your legs uncrossed, then you pass them uncrossed.
The more elaborate you make your actions with the scissors, the less likely it is the participants will figure out just what the crossing and uncrossing action is really all about. After awhile, then you may need to exaggerate your leg movements to help them catch on to what it is really all about.