Great math manipulative for hands-on discovery of 2D and 3D geometry principles. Learn about vertices, faces and edges while involved in constructing new models. Quarter curve pieces enable students to build and investigate properties of circles and cylinders. Contents include 330 pieces: 60 white balls, sticks of 50 each of 1.29", 2.08", 2.72", 30 each of 3.32", 4.13", 4.92" and 30 quarter circles with 20 double-sided activity cards., Skeletal Geo Set is a great math manipulative for hands-on discovery of 2D and 3D geometry principles, 20 double-sided task cards explore 2D and 3D shapes, triangles, quadrilaterals, polygons, circles, cylinders, spheres, and patterns. Answer key included, Quarter curve pieces enable students to build and investigate properties of circles and cylinders.