Test your Doctor Who knowledge against the TARDIS. Think of any being, place, or thing from the Doctor Who universe. Answer its questions and be amazed as a real algorithm with artificial intelligence guesses what you're thinking in 20 questions or less. Or, if not, you win! The Doctor Who TARDIS 20Q lights up and features information from the TV show. (Requires 2 AAA batteries not included.) Ages 8 and up.