What is the opinion of one who asks his young children to make du'a (supplication) for him because they are weak and their supplication is expected to be answered?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: Children are counted among the category of those who are not described as having loyalty (wala') or disavowal (bara'). And I, Honorable Shaykh, when I have a need or a worry, I ask my children to ask Allah the Exalted for that need, on the grounds that they have not sinned, so they are among the weak. Is this action correct?

Answer:
Yes, a child who can distinguish right from wrong (mumayyiz) has valid worship and supplication. If he is a mumayyiz, his supplication is valid, his worship is valid, and Allah accepts it from him and rewards him for it. This is good. And in the prayer for rain (istisqa'), they used to bring out the children and the animals so that mercy would descend upon them. Yes.