Then you need to be more precise with your terms if you do not wish to be misunderstood; which is why we use terms like "pre-pubescent", "adolescent" and "post-adolescent" when discussing these issues; rather than vague catch-all terms like "children". And, incidentally, at least in the English speaking world, "children" commonly refers to pre-pubescent and mid-adolescent (up to about 12 years old) individuals; anyone older than that is commonly referred to as a "teen" or "teenager".
I prefer to describe minors that are old enough that they shouldn't be treated as children as youths or juveniles, but legally speaking the terms are used far less consistently than child which has a well established definition of a person under the age of 18.
I think i had by that point already on more than one occasion stated that "child" includes everyone under the age of 18. I try to be as pedagogic as possible but in this case i wanted to try and avoid coming off as a broken record.