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.
This Abacus for the blind has a green frame with green and white beads. The Abacus for math has 15 rods with 4 green beads on top column and 1 white bead on lower column. Resistant Backing.
This Abacus for the blind has a green frame with green and white beads. The Abacus for math has 15 rods with 4 green beads on top column and 1 white bead on lower column. Resistant Backing.
