Explore materials for the formation of rotating geometrylower grades is a geometry enlightenment teaching tool designed specifically for young students, including rotatable colored cardboard (such as right angled triangles, rectangles) and a rotating base. The triangular cardboard can rotate around the right angle edge to form a cone; A rectangle can be rotated around its long side to form a cylinder. You can intuitively see the process of a flat shape "moving" into a three-dimensional shape. Transforming the abstract concept of "rotating to form geometry" into a fun dynamic process and cultivating spatial imagination is a vivid tool for beginners in geometry in lower elementary school.