Obviously it really depends on the child, but I can't imagine that the beautiful and somewhat formal afternoon tea would excite a typical toddler/infant or even a K-1 or 2. Of course, your child may be different and would be excited to sit in a real tea party, and they do serve a special kids tea that has chocolate milk instead of tea and PB&J sandwiches instead of salmon or egg salad.
If your goal is to show her the beauty of GF, oh yes, there are wonderful things to do with a little one there.....there is a FULL SIZE gingerbread house, made out of gingerbread....I'm betting she's love to see that and maybe hear you tell her the Gingerbread Man story while she nibbles on some gingerbread.....and starting at 3pm (most days, call GF ahead of time to be sure) is a pianist playing Disney songs....and they take requests, so you and your little one can dance and sing to your favorite Disney songs. Stand in the middle of the lobby area and look up....those are birdcages way up there....take the elevator (glass so you can watch yourself go up and down) and look at the Christmas tree from way up high. Take a stroll to the GF beach area and look at the Castle so far away, but right there too! Tell Princess stories while you watch the boats take people towards the Castle. Lots of great things to do with little ones at GF!
If you go in the evening you can watch the fireworks from GF.....a very different experience from watching them go off over your head on Main Street.....and most night there is also the water parade that you can see from GF beach. THAT is amazing to children of every age!