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Montessori materials are NOT toys, but educational materials. Proper use requires appropriate training.
Montessori materials may contain small, rough, sharp, or other elements that could cause injury or damage if used improperly.
It may therefore only be used by children under the supervision of appropriately trained persons and in an appropriate environment.
This material promotes mental arithmetic in terms of multiplication and the handling and labeling of large numbers. It deepens the insight into the decimal system. The bank game is a group game for three to five children. The material consists of a box with card sets for the representation of the multiplicands, the multipliers and the products.