K.A.
I think she'd LOVE IT! We've taken my daughter every year on her b-day since she was one, she's know almost 3 and is already asking if we are going :)
One suggestion I have, is to go in the afternoon or early evening on a weekday. I've gone to b-day parties that have been on Sat or Sun afternoon and it is a nightmare!!! It gets very crowded and it's harder for little ones to play without being trampled by older kids running around :)