My son complained to me while I was bathing him.
He said ma ma bullied him. And aunty waiting for school bus also bullied him.
The main issue was that the aunty who accompanied his kindergarten mate while waiting for school bus asked my wife if my son wears pamper when he sleep at night.
My wife asked the aunty to ask my son. He felt so embarassed and cornered that he complained about it for an hour after school. Ha ha. Didn't know that at such young age, face is already so important.
So I went through with him on how to help himself out of the situation. It was very hilarious to see him repeating the complaint.