The interviewer knows that nobody knows what a ‘cootie catcher’ is. (If there even is such a thing.)

Again, the reason why these kinds of questions get asked is to see how you think on your feet. Do you become confused, or upset? Do you try to answer in a logical manner?

In this instance in particular, an interviewer is also trying to measure communication skills. How well can you describe your concept? Do you break it down into clear steps? Do you stay on track, and do not jump around? It’s not your answer that matters. It’s how you come about it, and then explain it.