[He was aware she was there much in the same way he was aware she'd been in his class before, but it isn't until she speaks up that he really looks over. She still looks incredibly young and he isn't the best with kids. But even if he's not in the best mood today, he's not going to be a jerk to some kid building a...awkward pile of snow.]
Hi. [Coming to a stop near her. What do you say to kids?] Having fun?