YOU SAID:

I'll look after that child.

INTO JAPANESE

私はその子の世話をします。

BACK INTO ENGLISH

I will take care of the child.

INTO JAPANESE

私は子供の世話をします。

BACK INTO ENGLISH

I take care of my children.

INTO JAPANESE

私は子供たちの世話をします。

BACK INTO ENGLISH

I take care of my children.