Who used the word kid?

I'd say no, people don't usually use the word "kid" to refer to a teenager.

The march streetpass-meetup in Berlin:

I'm 30... so, I guess I'm "middle-aged" not "old"

In my eyes your not an adult if your still living at home with and off your parents and not supporting yourself in anyway, that's a kid

Many people in their 20s are kids?

If your a teenager and meet the above criteria your a child still

Official 3DS meeting in Sao Paulo, as you can see, lots and lots of children here.

http://3.bp.blogspot.com/-jO8tzYCV0w8/T_EOy0CFuoI/AAAAAAAACtQ/DJ_BBS8TepY/s912/11%2520%25283%2529.jpg

Every 3DS owner is an adult confirmed.

Cool story.

Same question as before, when did anybody use the word "kid" and not mention age ranges? You must have some reason to have bought it up. Also, "kid" is different from the word "child". It's all subjective in the end.

Look, I'm not having an argument with you, if your a teenager and are not supporting yourself you are still a child, a lot more teenagers "children" play playstation and xbox, As I've said, I've come across more adults who play Nintendo, and children who play playstation and xbox

So you want to go against a misconception brought upon by people who are just basing their conclusions off small sample sizes with your own misconceptions brought about by your conclusions from small sample sizes.  

You do realize how assinine that is right?