Dr. Montessori said: "children are workers and producers although they cannot share the work of adults, but their work is difficult and important, it is self-construction." 

Each teaching aid in the environment has its special function and purpose. The directress observes children, then guide and demonstrate the operating method for the children one by one. The children can see the whole process from demonstration, understand how to start, proceed and end the work, they will slowly establish sense of sequence and concentration. In addition, children's self-selection, operation and clearing make them personally participate in the activities and carry them through to the end.

In this way children can slowly create and construct themselves. So we call it "work", which is fundamentally different from the game can be played halfway and interrupted without any purpose.