I suggest that you let your children watch Baidu's Stop Sexism. Now there are more than 2 million friends. It's about how to quit watching porn, SY and other lewd content. The case inside is shocking. People who indulge in lewdness will definitely lose their vigor, and then their study and work will be depressed. After a long time, they will be riddled with diseases, psychopathic and become urban hermits. These contents will definitely help your children. The child is still young, and it is not too late to correct it. If there are physical and psychological problems, it will take several years to recover, or even a lifetime to recover.
3. When the children are older and their reading ability is fine, there are two books to focus on, namely, Abstinence as a Good Medicine and 10000 Cases of Masturbation Victims, both of which talk about the harm of pornography and how to quit and recover.
I hope I can help you.