Card Verification Code can be found on the back of the card, usually
within the signature panel.
can be found on the front of your card, just above the
number on the right side.
I have taken care of my two younger brothers (five and 10 years younger than myself), since I was young.
I have also babysat cousins, sometimes four or five at a time; of varying ages. And I have also cared for children of friends. In addition, for a short time, I cared for a child two days a week, who had behavioral issues, so I have experience handling children with such issues.
Just as a side note: I am a smoker, however I know that makes a lot of parents uncomfortable, but I assure you that I will not smoke cigarettes while watching any children.