More flexible body movements. Handprints of foreign middle schools fully encourage children to design handprints with more plots in regional activities, and then put them in the reading area to tell their peers. Middle-class children tend to have perfect hand development and dexterous fingers, and can skillfully carry out fine movements such as putting on and taking off clothes, zipping and origami. Body movements will be greatly improved, not only flexible operation, but also long-term persistence.