Write the names of famous people, animals, or objects on slips of paper or sticky name tags, then put one on the back of each guest, without letting them know what it says. They must then go around the room asking others yes or no questions to figure out who or what they are. Some children will figure out their identity quicker than others, so have back-up name tags or encourage them to stay a part of the game by answering other people's questions. You can also make things even easier for yourself and pick up a game of Hedbanz, which does all the heavy lifting for you.