Bring back childhood memories and introduce “the original guessing game”.  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 person.  Challenge opponents to a series of games, or 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.