Montessori Mathematics Material - Small Numerical Rods with Number Tiles Blue Red Color W/ Wooden Box Family Version This product is classical montessori math material. The size is from 2.5cm to 25cm of the rods. Eco-friendly wooden and handmade, 100% meet the stardard of the international REPORT EN71-3, ASTMF-979, the AMS & AMI standard
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