The Bead Decanomial (C 215) is a comprehensive bead material representing the squares and cubes of numbers one through ten, supporting upper primary students in exploring the algebraic concept of the decanomial expansion. It bridges the concrete sensorial experience of the bead cabinet with the abstraction demanded in later math work, making multiplication and squaring tangible before pencil-and-paper notation takes over. Keep this material available for children ready to move beyond the bead chains and into a deeper understanding of numerical relationships.