I think you are my new favorite person!!! She'll be just 2 and a hlf when we go and I BADLY want to do something just the two of us....no boys!!! This was perfect then I kept seeing 3-9 or 3-11 so I was bummed but if what you are saying is true......YYYIIIPPPEEE!!!!
For buffets, kids under 3 eat free. At TS that is not buffet, then the under 3 eats off your plate. If you order a child's meal, then there is a charge.
Not sure when you're going, but you might also consider taking her to Little One's Magic Hour. Starts on hour before MK opens (8am). Not sure of ages of the other children, but this could also be a great, just us experience: