Four-year-olds are not suitable for holding pens, and their fingers are not so flexible. Therefore, it is not recommended to teach them how to hold a pen at the age of four. They can wait until older children, aged 3 to 4, are not so flexible with their fingers. At this time, children in small classes, even small white friends, don't recommend learning to hold the pen so early, because they can only eat with spoons now. It will be uncoordinated if you can't eat with chopsticks so early. Most of the time, then the children in the big class can start practicing the posture of holding the pen, because at that time their fingers were more flexible. Now, if you teach him the posture of holding the pen, it will make the four-year-old children feel very tired.
When the child is older, or if your child is better at getting started, forget what I said before. The correct pen holding posture is below.