Have fun creating any picture or object by putting various shapes together. Corru-Shapes provide hours of constructive fun for children of all ages! These geometric shapes are made from sturdy (2.5 mm thick) white-coated corrugated cardboard. The smooth surface can be decorated with crayons, markers, paint, glitter and more. This pack includes assorted shapes, ranging in size from 2.5 inches to 5 inches. Included are: Circles, Semi-circles, Squares, Triangles (2 types), Rectangles, Diamonds and Ovals. Highly educational and stimulating, these geometric shapes are a great way to teach children about shapes and symmetry, patterns and critical thinking. The Hygloss Products Corru-Shapes are proudly made in the USA and environmentally friendly. They are fully recyclable and biodegradable.