Addition of zero means adding a number to zero. The basic principle underneath is that when you add a number to zero, the sum remains the same. However, some students might find the concept strange. That is understandable, but as simple as it sounds, some students will fail the game. Review this basic concept through a fun board game of zombies. This game is great for Halloween and parents will love it. For kindergarten, first grade, second grade, third grade students.