the "Shhh's"

I have this adorable student who keeps me laughing every lesson. Today we were going over a song, and learning a lot of knew things and she kept telling me that she didn't know what this and that were, and we got to this one song and it had two rests at the beginning. She goes: "Now you don't have to tell me what those are, those are "shhh's", you can take the "shhh's" out of the flash cards because I know what those are." I just laughed She didn't know the real  name for them, and in her school music class they just say "shhh" when they come to them. Anyway, I got a hoot out of it and thought you would too.