Open or Closed

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Equipment: A bottle

Holding a bottle out in front of you, turn it upside down and ask if it is "open or closed". The secret to this game is that it is based on your mouth; the bottle is just a distraction. If you hold your mouth slightly open, then the correct answer will be "open". Turn the bottle up and ask again.

Because there are only two options, some will get it right just by randomly guessing, but they know the secret if they can get it consistently right. You can talk while the participants guess, but return your mouth to the correct position after. As time goes, you can get more eccentric with your bottle movements such as by holding it on its side, diagonally, even behind your back.