Glad to hear that you've found your calling, frtloop85, and please don't take this wrong but just watch-out...
The first time the child calls you "mommy" in front of her parents, you will be looking for a new job.
It's not your fault, but if you are spending 10 hours a day with the child, then you are spending more time with her than her parents are. Her parents will feel guilty for not spending enough time with her and they will project their anger onto you.
I've never worked in day care, much less as a nanny...but my wife of 18 years did it while we were in college and the first time the child called her "mommy" she knew it was time to start looking for another job. It can be a real heart-breaker when you are attached to the kids.
just my .02, nothing more...Good luck!