Instead of demoing I'll link
20Q.net Inc. in 'Classic 20Q' form, think of something and it'll ask 20 questions in order to guess what it is you are thinking. Online version detracts from the novelty of it being just a toy but one that's able guess a seemingly endless amount of things... for instance a friend tried beating me (it) with a not so common vegetable, that's the day I learnt what an okra was.