Small that grew

The argument was that the ruling on this small child does not depend on the meaning of the mitzvah, but on the nature of the concept. For example, it is common to say that a small child who has grown up in the middle of counting the Omer cannot continue counting if the counting is one continuous and comprehensive mitzvah, because until he grows up he has not fulfilled the mitzvah of counting. My argument is that this is not a matter of the nature of the mitzvah, but of the nature of the concept of counting. Counting is a passage over all the days and not a statement about a single day, and therefore one must count from the beginning and not start from the middle. But in my opinion, there is no need for counting from the beginning to be considered a mitzvah. Therefore, if a small child counts as a small child, according to the law of education, it is beneficial for him to continue counting with a blessing after he grows up, because his counting is complete. The same applies to a child who has grown up in the middle of Yom Kippur. Here too, this does not depend on the essence of the commandment to fast, but rather on the meaning of the concept of "fasting," or "fasting." Therefore, if he fasted according to the law of education, he can and must continue to fast from the time he grew up.