My children are growling at each other

It's nap time up in here.  Well, it's supposed to be.  Layla is back in her bed and Evie is about 3 feet away in her crib.  And they are growling at one another.  Not really growling, more like roaring, which is the sound we say that bears make.

And it appears that it never gets old for them.

RAWR!

*giggle*

RRRRRAAAAAWWWWRRRRR!

*giggle* *snort* *giggle*

Wait.  Now just Layla is doing it.  Evie must be getting sleepy.  Shut up, Layla.  Stop doing it man.  Know your limitations and when you've lost your audience.

Shit.  Now Evie is crying.

And Layla is still roaring.

Thick skull, that one has.