For general protection, it is highly recommended to recite Surah Al-Falaq and Surah An-Nas , which were revealed specifically for protection from harm. Additionally, reciting Ayatul Kursi before bed is believed to provide angelic protection throughout the night.
The Prophet (s.a.v.) used to protect his grandsons with this dua, which parents can recite for their own children: Korkan Cocuklar Icin Dua Korkan Bebekler
While prayers provide spiritual peace, child development experts emphasize that "fear" is a normal survival mechanism. For general protection, it is highly recommended to
"Uizukumâ bi-kelimâtillâhi’t-tâmmeti min külli şeytânin ve hâmmetin ve min külli aynin lâmmetin." (I seek refuge for you in the perfect words of Allah from every devil, poisonous pest, and every envious eye) . For general protection