Conversation of the day, bonus edition

Me: What did you do at school today?

F: We did a play in science, about plants.  I was... uh... chlorosil, or something.

V: Chlor-o-phyll.

F: Whatever...

V: We did a play in science too, about electricity.  I was "positive".

F: You should have been negative.  'Cause, you know, you're negative.

V: Yeah, I get it.