Beat-up by a kindergartener

Last night I noticed a small abrasion on Darby's forehead, right between the eyes. I asked what happened, to which she responded that a kindergartener threw a pinecone at her at recess and it hit her in the head. As she continued to explain, she started crying. Apparently she told the parent of the girl, who arrive shortly after, though tried only briefly to get an apology from her daughter. Darby never told a teacher, so this morning when we got to school, we reported the incident in the event there was another. It was odd to be reporting that a kindergartener made my ten-year old cry, but then again, I supposed it would be worse for it to be the other way around, for Darby to be in trouble for beating up a little girl.