Answered by Shaykh Umer Mian
Question: As Salam Alaykum,
Is it permissible for a child who is not yet toilet trained (i.e. wears nappies) to wear a necklace with the verse of the Throne (ayat ul kursi)?
Answer: Wa alaikum as-salam wa rahmatullahi wa barakatuhu
A Qur’anic verse written on a piece of paper (or the like) and worn on one’s person is called a ta’wiz (تعويذ) in Arabic. For a discussion of the general permissibility of using a ta’wiz, please see this answer by Shaykh Faraz Rabbani.
Regarding putting a ta’wiz on those who are ritually impure, Ibn Abideen states the following in Radd al-Muhtar (the primary source of fatwa in the Hanafi madhab):
وَفِي الْمُجْتَبَى … وَلَا بَأْسَ بِأَنْ يَشُدَّ الْجُنُبُ وَالْحَائِضُ التَّعَاوِيذَ عَلَى الْعَضُدِ إذَا كَانَتْ مَلْفُوفَةً ا هـ (رد المحتار، كتاب الحظر والإباحة، فصل في اللباس)
“It is said in Al-Mujtaba (a well-known Hanafi fiqh text): … There is nothing wrong with a person in major ritual impurity (i.e. a junub or a woman in hayd) tying a ta’wiz on their arm, as long as the ta’wiz is wrapped.”
A small child is in no worse state than someone who is ritually impure. Therefore, it would be permissible to put a ta’wiz on a small child as well, as long as the Qur’anic verse is wrapped in something (e.g. a piece of cloth or paper).