Montessori teaches "error control" features, this allows young children in the course of the operation to find errors, make corrections, do not require the adults to chatter on the side of the guidance and care, so as to ensure that the children's autonomous education process smoothly, so that the stimulation of teaching aids can maximize the attention of young children to stimulate the focus. At the same time, because Montessori teaching aids operation rules are strong, requiring children must respect the teaching aids, this unconsciously improve the children's sense of responsibility and sense of the surrounding environment, to help children realize self-awareness.
Toys do not have the "error control" function, and generally do not have standardized procedures to follow, can only rely on the imagination of children. However, the imagination caused by the toys is disorganized, without the purpose of explicit education, and thus the effect cannot be revealed. At the same time, because toys in their application process, children can be arbitrary, with their good casual use or abandonment, which is very detrimental to the environment of the child's sense of responsibility and discipline.