Please note:
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.
The child forms first words with the movable alphabet. In this case, the ear decides on the word laid out. Thus, primarily in moss, Mos is also correct, as the second 'o' is not pronounced audibly for a child.