Her favorite game is to pretend her dolls (and trains and bath toys) are sleeping.
Aaaawww poor baby. Well, we've talked. I have the same problem with younger child. Except she doesn't wake up early, she just stays up forever, whether I lay down with her (bad idea) or leave her alone. She wakes up in the middle of the night as well for me to come back in bed with her (hence bad idea to lay down in the first place). Never does that with dad when I'm gone. Only thing that works is bribery (promise of pancakes in morning, or watching a DVD, or whatever, if she stays in bed).
Meanwhile the 6yo (always a great sleeper) still naps 2+ hours on weekends (no naps in 1st grade!), sleeps 10+ hours at night, never wakes up at night. Then again he probably needs a T&A which I'm avoiding. Interesting though - he'll wake up earlier on weekends than weekdays. Trying to avoid school? Nice try buddy...