Make your own 2D figures and skeletal 3D models! 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. Includes 60 white balls, 50 sticks each measuring 1.29", 2.08", and 2.72", 30 each of 3.32", 4.13", and 4.92", 30 quarter circles, and 20 double-sided activity cards. 330 pieces.