ALT The image shows a twelve-sided shape created with 21st Century Pattern Blocks. It was built by arranging 6 rectangles and 6 equilateral triangles around a central regular hexagon with each side of the hexagon measuring 2*sqrt(3) inches. The design uses blue rhombuses, green triangles, and teal kites.

ALT The main image in the upper left corner shows a radial design created with 21st Century Pattern Blocks. The design begins with six octagons arranged around a central star. Each octagon uses the same block arrangement in the first layer. Surrounding this, a second layer consists of 6 additional octagons, constructed using a different block arrangement. The first two images along the bottom show the two distinct octagons used in the design. The first octagon is made up of 3 teal kites, 6 blue rhombuses, and 13 gray darts. The second octagon is made up of 2 pink triangles, 3 teal kites, 8 gray darts, and 9 blue rhombuses. The three images on the right show the progression of the design.

ALT The main image in the upper left corner shows a radial design created with 21st Century Pattern Blocks. The design begins with six octagons arranged around a central star. Each octagon uses the same block arrangement in the first layer. Surrounding this, a second layer consists of 6 additional octagons, constructed using a different block arrangement. The first two images along the bottom show the two distinct octagons used in the design. The first octagon is made up of 1 blue rhombus, 5 teal kites, and 14 pink triangles. The second octagon is made up of 4 teal kites, 5 blue rhombuses, and 12 pink triangles. The three images on the right show the progression of the design.