Montessori Math Teaching Aids: Montessori multi-function giant array calculation bead frame, Montessori mathematics enlightenment system. Intuitively assist children in learning addition, subtraction, multiplication and division operations, turn abstract arithmetic formulas into tangible bead sliding games Montessori color matching: green, red, blue three-color differentiated bead design. Clear color distinction helps children quickly distinguish digit levels, quantity changes and arithmetic logic, easily master number counting, number combination, and multi-operation arithmetic calculation Premium Safe Natural Solid Wood Structure: Whole set made of high-quality natural beech solid wood, finely polished all-round, no burrs, smooth round edges and corners. Thick solid rod, flexible sliding beads, not easy to fall off and break. Non-toxic environmentally friendly paint, bright color and long-lasting color fastness, strictly meet children's toy safety standards Multi-scene Calculation Training: Super-long bead rails, sufficient number of beads to meet all preschool addition, subtraction, multiplication and division calculation practice. Foldable stable wooden frame, not easy to tip over, large bead size easy for small hands to grasp and slide freely Early Education Interactive Toy: Ideal math enlightenment toy for Montessori kindergartens, preschool classes, home homeschooling. Perfect parent-child arithmetic interactive game, effectively exercise children's hand-eye coordination, concentration, number sense and logical computing ability