In the process of arranging and doing problems, the teacher guides the children to operate, inspires them to think independently and enables them to acquire the ability to think and solve problems. In this link, children can explore and find the corresponding synthesis method by operating the foam diagram in their hands, and are willing to express boldly and share the results with their peers. In the hands-on operation of foam puzzles, teachers use appropriate language to inspire children to think and solve problems independently, with the aim of training and developing children's autonomous learning ability. At the same time, teachers can interact effectively with children through games, so that children can really participate in teaching activities.