Never. A kid is a baby goat.
kus is offensive and roughly equal to the c word. nartik is the word that kids would be taught to use in proper speech. There is no children's female equivalent to bulbul.
children
Goats (goats kid) from the German language. The word kinder means children and the garten means garden. In English, this translates into garden of children. Kinder, or Kids. I think it is more appropriate to call them children, & not use the word Kid. I feel kids makes them more like animals. ;]
Instead of using the word challenging you can use the word gifted, special, special gifted.
or
Will, when, why, it, can
use tea instead of coffee.
Myself
I have a stomach ache.
mixture
are
used to be