This thread is worthless without the source article. Cursory Google-Fu for "12 Year Old Girl Charged With Child Pornography, Phoenix, AZ" didn't match any articles on the first three pages. In fact, the closest to the age I could find was a case involving a 14 year old girl sending pictures to her fifteen year old boyfriend.
As to the charges... The suspect is a 12 year old and apperently everyone she sent the picture/s too were also minors. Worst that will happen is she'd get a stern talking to with nothing added to a preminent record.