Brain Puzzles For Both Adults And Kids Tangram puzzles were invented in China around 1000AD. The original tangram puzzle was a large square into 7 pieces: 5 triangles, 1 small square, and 1 parallelogram. This modern revision cuts a hexagon into 11 pieces, which adds an extra layer of complexity and flexibility. This Wood Hexagon Tangram Puzzle is an ideal way to raise children's spatial visualization and intellectual abilities. Our Mako Toys Brain Puzzles also have the following features: - Wood pieces are child-safe. The surface is smooth and corners are round. - It is compact with dimensions of 5.5" x 4.7" x 0.6" and a weight of 3.5oz. It is perfect for traveling. - There are multiple solutions. See how many you can discover. - Contains an additional surprise in the package.