Write the names of famous people or places (or use animals or fruits for a simplified version) onto 3x5 cards. Attach a card to each learner's back. Give them time to mingle and ask each other questions to try to figure out their tagged identities. This is usually limited to yes/no questions, although beginners might be allowed to ask any question they can. Be at least 90% sure that the learners have heard of the items on the cards and especially the ones you place on their own backs.