What dua should I read to blow on my children for their health and good moral development and as a safeguard against evil?

Answer

Your first obligation is to provide proper Deeni ta'leem and tarbiyat to your children. Then depend much on Dua. Dua means to supplicate to Allah Ta'ala to guide your children. You may recite Surah Faatihah, blow on water and give to the children to drink. Always keep a supply of such recited-on-water in your fridge. Also recite Al-BIRRO seven times and blow on your children. May Allah Ta'ala bestow to them true Taqwa. For safety from evil, recite Surah Falaq and Surah Naas three times each and blow on them. Also teach them to do so.