I'd just like to add...my daughter is 11 1/2 and sits with a few little girls on our street.....daytime only....and only when I or her grandmother (who lives on the same stree) are at home, incase of emergencies. She started out sitting for them when their mother was at home for a few hours so she could get her feet wet, the mothers were very good....they let her do what they wanted her to do and even set up a few tests...such as having someone come to the door...call on the phone etc to see how she would handle the situations. Then the mothers graduated to leaving her alone with the little girls, but being only one or two houses away.....then graduated to having her come over when they went grocery shopping or to the bank or something.
Its working quite well....she's learning real responsibility and making her own money, Im so proud of her