- Designate one player (the thinker) to think of a person, animal, or thing familiar to all the players.
- The other players (guessers) take turns asking yes-or-no questions to help them guess the person, animal, or thing.
- The thinker must keep track of the number of questions asked. If you like, distribute twenty counters (pennies, beans, or paper clips) evenly among the guessers.
- As each guesser asks a question, she gives a counter to the thinker. When the guessers run out of counters, the game is over.
- Any guesser may try to guess the person, animal, or thing on her turn. If she's right, she's the thinker for the next game. If she's wrong, the guess counts as one question, and the game continues until someone guesses right or until twenty questions have been asked.
- If no one guesses right within twenty questions, the thinker reveals the person, animal, or thing and starts a new game by thinking of a different person, animal, or thing.