Seat the children in a circle. Help the birthday child think of a message related to your party's theme. The birthday child then whispers the message to the person on their left, who repeats the message to the person on their left, and so on. When the message has traveled all the way around the circle, the person on the birthday child's right tells the message out loud. Then the birthday child tells the original message. Expect the unexpected when you hear how the original message compares to the relayed message! It's always worth a laugh!