Please show me example sentences with What deference between kids and children，or kid and child？ . Tell me as many daily expressions as possible.

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A kid is technically a baby goat, but nowadays it means child too. It is sometimes used as a term of endearment by adults or older teenagers to younger children. (E.g. “Be careful, kid”. A variation of this word is “kiddo”.)
A child is an immature person whose brain is significantly underdeveloped compares to adults. They are under the legal age that declares a person to be an adult. So here, anyone under 18 is a child.

Kid is a little more casual/informal than “child”.

Example sentences:
“She has 2 kids.”
“We are raising three beautiful children together.”
“I love my child so much.”
“There’s too many kids here.”
“That’s for little kids.”