I have been baby-sitting since I was 13 years old. I started with a few of my mother's coworkers' children aging from 2 years old to 9 years old. I would watch them on evenings from roughly 4:00 p.m. to 10:00 p.m. once or twice a week. The first woman I baby-sat for had two little girls, 3 and 5. She referred me to another...