What kinds of talk therapies are good for helping children cope with child abuse?

Play therapy: Children don't want to sit and "talk it out" like an adult. They want to be able to understand why things happened to them and make sense of their lives. Play therapy allows them to gain trust with an adult, and introduce ways a therapist can discuss forms of abuse, why they happened, why it isn't the child's fault, and how the child can proceed and trust again.

Several types: This is increasingly well studied. Look up work by alicia lieberman and judith cohen. There are proven treatments available, but they require trained professionals.