The Blind Abacus

The Blind Abacus Professional Mathematic Concepts Blind Abacus Learning Tool for Early Education

• Perfect abacus for blind people or to teach children and for adults to do quick calculations.
• The color of the balls can vary and be white.
• 15 rods with 4 balls at the bottom and 1 ball at the top per rod.
• It contains a pad that prevents the balls from returning to their initial position.