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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.
Even in her early days, Maria Montessori was socially critical in various ways. Under the title chosen by the editor, Montessori's early writings on women's emancipation, economic and social conditions for equal opportunities in education, the relationship between family situation and education, and the promotion of disabled children are collected.