Time Telling

Seemed like a lost cause, even though all we really care about is that she not get up before 7 AM. I'd say to her, "It's not seven yet," and point to her digital clock, but then a seven would show up in the minute place and she'd say, "It's seven!" And I'd say, "It has to be a seven on the left side," but though she can tell her left hand from her right hand I don't think she can generalize.
But this morning, at seven-twenty-something, we heard her shout from her bedroom: "It's seven o'cwock! It's seven o'cwock!"
I suppose we might still get the false positives...