Thank you for your service and welcome to JustAnswer.
Her bond is set at $684 dollars. She is supposed to get out on the 11th, but if she does not have the money how will she get out?
September 11 could be her court
date to go in front of a judge. That does not necessarily mean she will get out, but if she were to plead guilty and get probation she would get out. Even if she pled not guilty, it is possible that the judge would reduce her bond amount or let her out on her own recognizance. There's no guarantee of that though.
How bad is this for her.
It's obviously not good, but if your daughter's physical well being was not in danger, it is not likely to be the kind of case that the Commonwealth's Attorney will seek jail time. That's also indicated by the relatively low bond amount. Anything less than $1,000 is a low bond and indicative of not a major offense.
I will also note that just because she was arrested for a certain crime does not mean that is what the Commonwealth's Attorney will charge her with. They could charge her with a different crime or decline charges all together. A lot of 13 year olds babysit even smaller children so unless your daughter was in some sort of danger or unsafe situation where she was left at, I don't view this as something likely to result in additional jail or prison time.