Polydron Sphera Class Set a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; } Create over 16 different spherical constructions at once with this ideal class set, designed to help students understand spheres, cylinders and cones using the trusted Polydron system. Sphera offers hands‑on exploration with easy‑to‑follow instruc
