Send one person out of the room. Encourage the rest of the group to pick an object in the room or on somebody’s person. The object can be large like a piece of furniture, or small like a button on a shirt. Once the object has been determined, the person comes in and the leader points to random items in the room while asking if it was the object picked. Here’s the trick, before you point to the object the class picked, point to an object that’s black. When you point to the object the class picked, the person sent outside should guess the object correctly. (It’s good to have the person sent out to know the game in order for it to work.) After you play a few times, invite to some of the group to try and guess an object to see if they’ve figured it out. The group will go nuts trying to figure out how you know what object was picked when you were out of the room.