Proof! The Fast Paced Game of Mental Math Magic by The Master Theorem Games is an educational card game designed for 2-6 players. With a theme of mental math magic, this game challenges players to solve math problems quickly and accurately. Suitable for ages 8 and up, this game is both fun and engaging, making it a great choice for both boys and girls. Made in the United States in 2019, this new and sealed game promises hours of entertainment for young players looking to improve their math skills through play.