"How was I s'posed to know? It looks like magic." She sounds a little put-out, but curiosity wins over her mild annoyance, and she takes a few steps closer.

This girl's eyes. There was something wrong with them, but even she isn't rude enough to comment on such a thing, not at the moment, anyway. Instead: "It's not bad." This is the closest to praise she's going to get for now. "How d'you do it?"