Abstract: In order for children’s shaping activities in preschool to be really effective, the selection and rational use of materials plays a very important role. Because it helps children to be active, explore and create the products they want, thereby making them more interested and enthusiastic. In fact, most preschool teachers often choose and use ready-made materials such as colored paper, drawing paper, shape notebooks, crayons, glue, clay, etc. to perform the lessons. shape in the program without paying attention to the use of open materials. With the desire to stimulate children to be creatively free, express their shaping ideas and develop their talents, the use of open materials in shaping activities in preschool is extremely necessary.