I agree with the others. Something is going on here that is beyond your scope as the caregiver to address. What her parents really need to do is take some time to stay home with her and get things under control before putting her in another child care situation. Of course, that is up to the parents to decide, but you don't have to continue dealing with their problem child. Destroying your property, being physically aggressive, enough is enough! It's time to say, sorry, but for the safety of the other children, I can't care for her anymore.