Three-year-olds should really be able to play by themselves. Hugging is a habit of family members. After the child was over one year old and could walk, I was asked to hold him every day for a while, but he always walked by himself when he walked with my parents. And letting him play with other children is the best way to change. As for speaking, adults should teach their children more and talk to them more, and children will talk if they accumulate more languages.