The interviewer would like to get to know you apart from your resume. You are indeed not obligated to discuss personal matters such as your kids, or relationship status, for instance. Stick with a couple of fun facts to show the interviewer that you are a real person, too. Your answer should be unique so that you are a memorable candidate!
Focus on unique non-work related skills or hobbies. For instance, you might share that you enjoy beat-boxing or making origami swans. Be prepared for the interviewer to stop you and ask you to perform your skill on the spot when it's possible! (This will make you unforgettable!)
