Re: Duas for kids
One of the 99 names of Allah...I can't remember, but if you recite it a few times and "dum" on the kids it helps kids to become more obidient. Please refer to the book.
Parents should also recite surah naas and falaq to rid ourselves and children of "buri nazar." It really does help.
And if there are major problems, doing 2 rakats of salat-ul-hajat is recommended.
Also, have the parents considered seeing a counselor?