Colin at Mandarin

Colin has been attending the Chinese class for three weeks now.
He doesn't want to attend it by himself and would cry until you can hear him ten floors under.
So that is really no good for him..... and we sneaked Maricar in to the classroom. As long as there is a familiar presence, Colin calms down and he is actually very interested in the lessons. (If not, I would have stopped the class, regardless refund or otherwise).
So anyway, with each passing week, we hope the boy will gain security and independence.
Yesterday, after the lesson, I asked Maricar if Colin was okay in class.
She said yes, he said "Ya, Ya" to the teacher.
I said, no, Colin. Say "Yes", not Ya, Ya!
Maricar explained in zest -- Maam, Ya is teeth, Ya!
LOL. Ya,,, the Chinese word Ya, they are learning Eyes, Nose, Teeth, etc. I see.