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.
The ages of children I have watched before range between 6 months to 12 years-old. So I know how to change diapers and make bottles. Usually watching at night involves me making them dinner and entertaining them (playing board games, putting in a movie, etc.) until bed time. I've helped with homework a few times, which does not bother me at all.