With the Guess Who game, each player chooses a mystery character card, and then, using yes-or-no questions, they try to figure out the other player's mystery.Does the mystery person have a moustache? Is the mystery person wearing a hat? Challenge opponents to a series of games, or take up the challenge by not asking if the mystery person is a boy or a girl until the third turn. The Guess Who? game is a great indoor activity for kids ages 6 and up.