Are the deeds of a child who has not reached puberty, such as prayer, Hajj, and recitation, counted for their parents or for the child themself?

The righteous deeds of a child bring reward to the child, and their father or whoever teaches and guides them to good and helps them in it will also be rewarded. This is based on the Prophet's (peace and blessings be upon him) statement regarding a child's Hajj: "Yes, and you shall have a reward," and his saying: "Whoever guides to good is like its doer in reward."