My father has custody of my niece and 2 nephews. My father is in his sixtys. The children are 6,8 and 10. My father needs help. We have agreeded to spilt the children up, I will take the older boys and my father and mother would keep the youngest, for now. Cps said the case is closed. We don't know where to start.

I don't know what you mean by "the case is closed." Permanent custody is with your father?