Most people want to find the feeling of being cared for by their parents in their children's dreams and express the feeling of being treated gently and cared for. In addition, I also have a feeling that I am a child, that I can't do anything and don't want to do anything.
Jealousy
People who have brothers and sisters will also let their children play in their dreams, because the care they get is jealousy.
There is also the mentality of wanting to find the carefree feeling when I was a child.