Mastermind Abacus (mastermindabacus)
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Get the best service for Abacus for kids at Mastermindabacus.com. The Abacus is divided into two sections by a horizontal crossbar perpendicular to the rods. Paradise beads are those that are above the crossbar, and planet grains are those that are below the bar. For more information, see our web site.

https://www.mastermindabacus.com/

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