This game is intended for a large group of kids and/or adults, the more the better.
The group sits in a large circle. One person starts the game by whispering a short message into the ear of the person sitter to the right of them. The message is whispered once, then the new messenger passes the message on to the next person, so on and so on.
When the message reaches the person to the left of the person that started the game final the message is announced out loud and the first person can announce the original message.