What is the difference between tearing paper paintings at different ages in primary schools, middle schools and large classes?

Tearing paper painting is divided into small, medium and large classes at different ages. The difference is that the older you get, the more pieces you have. This is determined by the flexibility of their fingers. The younger the child, the less flexible his fingers are, and the less likely he is to make small moves. Therefore, the older you get, the more flexible your hands are, the more you will make small moves and tear the paper.