K.D.
I found this helpful:
http://www.kidshealth.org/teen/question/dieting/swallow_g...
Basically, her body should just send it through her system without any ill effects. However, since it was a fair amount for a small child, I would just watch her carefully. If she complains of cramps, stomach ache or becomes constipated or runs a fever, I would take her to the doctor.