Children who are too shy to say hello to their parents can say the same

Wrong approach: urging + criticizing and suppressing

Baby, go over and say hello to your uncle and aunt

How so rude, hurry up!

Hey, isn't it nice to say at home?

How come it's dumb?

The guts are so small, it doesn't look like my children at all!

Correct demonstration: understanding + encouragement to guide

Baby, we'll see my uncle and aunt later

You can try to say, uncle and aunt are good

So it doesn't matter if you don't want to talk.

You can beckon to your uncles and aunts

Baby laughs best

Remember to laugh at them!