aiya.. sometimes really don't know what to do with this small
kid. ignore him.. he'll continue to kpkb - gloat, brag, boast,
taunt, spite, criticize, insult, blast, flame, discredit,
etc.
and if you advice him & tell him nicely, he'll still continue.
Just look at Stella's advice to him, it fell on deaf ears and he
became even more rebellious and obstinate.
How? What to do? 