This Abacus for the Blind is a Cranmer-style abacus used by blind children to gain an in-depth understanding of numbers and mathematics, and by blind adults to perform quick calculations.
• Abacus for the Blind perfect for teaching children and for adults to do quick calculations.
• Abacus for Math – Colour may vary.
• 15 rods with 4 beads on top column and 1 bead on lower column.
• Resistant Backing.