My 4 yo step daughter has been waking up early like that since she was 2. You may have to just get used to it. We used to just welcome her into our bed and hope she got to sleep again but it that didn't work one of us would get up and start the day. These days we turn the kids channel on the tv and she watches it til she gets hungry then one of us gets up (usually me) so she can have breakfast & if possible I return to bed for a snuggle with her dad. We are lucky though - our lounge room is right across from our bedroom so it's easy to keep an eye on her without leaving bed.