Sleepyhead

Walking through the playground, I could see 2 girls from my ensemble.  Girl 1 waved vigorously (think someone drowning in the surf) and ran over; Girl 2 followed less energetically.  I don't use their names here - obviously they didn't refer to each other as girl 1 and girl 2.

Girl 1: Mrs M!  Mrs M!  Mrs M!
Me: Hello!
Girl 1: Um, just to let you know. 
[Girl 2 starts nodding her head to the side].
Girl 1: Girl 2 is having some medication...
[Girl 2 tucks her hands under her chin in sleeping fashion].
Girl 1: ...for her teeth...
[Girl 2 starts miming snoring; I try not to laugh]
Girl 1: ...and it's -
[Girl 2 starts snoring]
Girl 1:  - what?  [giggles] - oh yeah, it's making her sleepy.  So we don't know how she'll be this afternoon.
Girl 2:  Yeah, I might be falling asleep, but I'll try to stay awake!