I forgot what it was called, but you make the birthday person leave the room. This game is a prank so it can be done only once. You explain to everyone else that you're going to ask the birthday person to solve a murder/ other mystery. You tell them that the birthday person can only ask yes or no questions. If their question ends in a vowel, no matter what the question is, you all say yes. If it ends with a continent, you say no. If it ends with a y you say some times. You bring the birthday person in and tell them there was a murder/ mystery thing and tell them they have to ask yea or no questions to solve it. When they think they have the answer, they must ask it in a form of a question, or else you can't answer.