On DS' first trip at 3 3/4 he met the height requirement so we thought it was a great idea to bring him on whatever we felt "safe" doing. I know we brought him on Tower (bought the pic b/c you see DH and my arms link to old him in and sheer terror on my face). DS had no problem and enjoyed it but looking back I would not do it again... just too young.
All turned out fine thank goodness but we both look back and say "What the heck were we thinking?"
BTMRR, HM, DInosaur even test track were fine just feel crazy that we brought him on terror.
I bet she will meet the height requirement! Have a magical time with whatever you do