During the pandemic, wearing a mask became an everyday routine. But how often do people question the purpose of masks in general? When we look back in history, masks had many different forms and played many different roles in different societies. The Mask World is designed as a card game for people to learn about different functions of masks. There are three kinds of mask cards divided by their purposes: practical, playful, and sacred. Each player has to pick one card and find a matching sticker. The first person who matches all cards correctly wins the game and receives an award in the form of a poster with the entire collection of masks. Entertainment games inspire curiosity and make education more interesting.