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2-row abacus, each containing 5 red beads and 5 white beads to count to 20.
2-row abacus, each containing 5 red beads and 5 white beads to count to 20. Sturdy plastic frame and beads, metal rods. Stable triangular structure inclined to optimize visual discrimination and manupulation. 25 x 7 x 7 cm high.
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Age: 3 +
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