The function of putting toys in the jigsaw puzzle area of the middle class is to teach children to understand and learn their toys, make full use of their senses to think and feel some scenes of objects, such as shape, size and structure, so as to have a basic understanding of the height, thinness and greatness of objects in daily life, and at the same time give play to their subjective imagination, so that they can enlighten their wisdom in constant exploration. In the specific activities, the types of teaching toys should conform to the cognitive ability of children in the middle class, so that the children's activities will become wider and adapt to their development.