In fact, why not pray about such things with your children before they leave for school, perhaps after considering the daily text together?
فلمَ لا تصلّين بشأن امور كهذه مع اولادك قبل ذهابهم الى المدرسة ،‏ وربما بعد مناقشة الآية اليومية معهم ؟‏