What age do you consider the end of childhood?

when yall can be sent to adult jail

37

when you find out theres no santa and easter bunny. sob!

WHENEVER! Never for me, i'll always be childish and silly.
But you see, some children (12 year olds) think that theyre adults, and can cover themselves in make up, have sex, drink and smoke.

I don't believe your question can be answered as asked. Each of us ends childhood at a different time. At 12 I was a commercial fisherman, earning a grown man's wage.
It seems many today, still living with their parents and unemployed, could be considered children well into their 20's.

20. Because thats when you are old enough to get married and have sex.

It depends.
But I can't believe most people went for thirteen.

never

about 11 and a half. By 12 I was already thinking like a teenager as were most of my friends.

I feel like mine ended at age 10 or 11. I stopped doing things that children normally did. I stopped playing with toys and became more serious. I wish I hadn't though. I missed out on a lot.

13 because that's when i lost mine.
Also, technically its about then anyway because that's when people usually start puberty.

At 14 when you enter high school and you start needing to look at the world in a adult-like manner and prepare yourself for the outside world. Entering HS is the transition of a child into young woman/manhood.