Telling time

So last night I was listening to D's monitor after she had been in bed for awhile. It had been quiet for awhile so I thought she was asleep. Until I heard...."It's 8 o'clock! 8-1-0. That's 10. It's 8:10!" I know it's just a digital clock but how cool that she figured that out on her own! And how not cool that she was still awake!!