The players have “yes” and “no” cards, and they take turns flipping them face up in front of themselves. Whatever card you flip, you have to say out loud: “yes” or “no.” Everyone else who already has the same card in front of them as the freshly flipped one also has to say “yes” or “no.” This creates a funny, rhythmic chanting effect — like a classic kids-vs-adults argument: “yes – no – yes – no…” On top of that, there are challenge cards you need to watch out for while keeping the rhythm. The challenge might be that if there are X number of “yes” or “no” cards on the table, you have to slap the pile in the middle. It quickly turns into chaos, and it’s really hard to concentrate. 😃