As a child, do you forgive your parents for what they did and did not do? As a parent, do you forgive your child for what they did and did not do?

As a child I can only thank them.

In general, understanding that forgiving is for you to help you move ahead. Forgetting and focusing on more important things help to forgive and move ahead. If it is of criminal nature and comes under boundaries of law, it's better to leave it for law to take it's own course.