We don't know if it was the fall off the swing onto the right arm yesterday, or the fall while running in the kitchen (also onto the right arm) today, but Monkey Girl has a broken right radius. It's a buckle break - a very minor one, but enough to warrant this beautiful hard splint. In two weeks, we find out if this is good enough, or if it needs a full cast. I doubt it will.
Stop freaking out, Dad.