So this is possible to get changed as the child grows up. Good observation by the author and I also experienced as explained earlier.
As they enter the age group of 10-12 years they are drawn to games, books and friends more than they are attached to their family members.
This brings a lot of temperamental change in them and they appear to be sober and calm as compared to their earlier moods.
This stage further grows in a college environment where due to the diversion of mind to sports, cultural activities etc brings a phenomenal change in the child and parents are relieved from his earlier wild behaviour.
Unfortunately, in few of the children, this does not happen due to various reasons and they remain arrogant and aggressive. That is where a psychological consultation is required to find out the ways to get the child on a corrective path.
Knowledge is power.