If you are talking about the My Disney Girl Princess Tea Party it is held at the GF just off the lobby. Your 4 yr. old would probably love it. We have not attended it yet but we walked past it last Dec. and it looked like a lot of fun. It is pricey though($200 for an adult and 1 child), but the children get several things to take home and both adult and child get a lunch. Aurora and Rose Petal are there to tell a story and interact with the children.
There is also the Wonderland Tea Party at the GF in 1900 Park Fare. This tea party is for the children only and has Alice and the Mad Hatter. The price is about $35 and the children get a photo of them with the characters, a light lunch and they play games with the characters and have a great time. My DD4(at the time) did this and had alot of fun.
Hope this helps!