Explore the fascinating world of polyominoes in this 30-minute video lecture from the Elementary Mathematics series. Discover how to form shapes using unit squares in a grid plane, learn about trominoes, tetrominoes, and pentominoes, and delve into counting different polyomino forms. Engage with challenging tiling problems suitable for primary school students, including tiling with trominoes and tetrominoes. Investigate when two polyominoes should be considered the same, understand the concept of polyomino size, and learn how to use checkerboard patterns to color cells. This engaging lecture offers a fun and educational introduction to polyominoes, perfect for developing spatial reasoning and problem-solving skills.