Durable Math Tool for Children or Adults
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.
The Abacus for math has 15 rods with 4 beads on top column and 1 bead on lower column. Resistant Backing.
NOTE – COLOR MAY VARY