Funny Mary

I just thought of this and wanted to put it in before I forget.  Mary has a hard time sleeping in in the mornings.  And when I say sleep in I mean sleep until 7.  She's been waking up around 6:15 or 6:30 and then she ends up tired and irritable.  So we tried putting some dark curtains up in the girl's room so it's not so light early in the morning.  First day she slept until 7:15.  Then there was another early day and then another after 7:00.  But the last after 7:00 I asked her about it and she said that she was just really tired from playing in the night.  Evidently if she wakes up in the night she plays with her stuffed animals until she is tired again.  Silly girl.
This morning it was Anna that woke up at 6:30.  She then woke up Mary.  What do you do.