According to the fortune-cookie logic most people live by, the best things in life are free. That's crap. I have a gold-plated robot that scratches the exact part of my back where my hands can't reach, and it certainly wasn't free.
First off, I call them "children", not "kids". I am a child, and I am not ashamed to be one; time will cure this unfortunate condition. "Kid" is the cutesy name adults call children, because they think "child" sounds too scientific and clinical. I refuse to call myself by their idiotic pet name. Your grandmother might call you "Snugglepants Lovebotton", but that's not how you introduce yourself to strangers. I also refuse to use terms like "teen", "tween", and etc. I find them patronizing and putrid. They are fake words, used to disguise the truth--that anyone under the age of eighteen is legally (and that's the only thing that matters) a child.