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've worked many baby-sitting/nanny jobs for children of multiple ages. My most recent one was a family of four children, ages 8-weeks-old to 6-years-old. I've also worked for three years at the YMCA baby-sitting room, so, dealing with multiples is not a problem!