The chairperson selects an object/idea/whatever and announces whether it's animal, vegetable, mineral, and/or abstract. The others have to ask questions to figure out what it is. Whomever guesses the object correctly is given the chair for the next round; repeat ad nauseam.
Animal, but not a bird, fish, reptile, insect, mammal, single-celled organism, or virus. Not indigenous to any particular continent. Went extinct more than 225 million years ago.