Students were learning nouns in my class. They were given a note card with a noun on it and it was taped to their back. They could go around the room and ask other students only yes or no questions to find out what noun was on their card.
For example, Am I a person? Am I a thing? Am I alive? Am I blue? etc. It was a great beginning of the year assignment to talk to each other and learn nouns at the same time