I have read an article about Plural They and now I have a question struggling in my mind. Consider the following sentences:
Each child played with their parent.
Every client got a care package delivered to them.
May I use the pronoun "it" or "it's" in place of "they" or "theirs" like the following ones?
Each child played with it's parent.
Every client got a care package delivered to it.
If it's possible, Isn't it uncommon or odd, somehow?