Can try to bake emma's bday cake, but a smaller simple version - maybe just a or a cake, and use one mini princess toy as a cake topper with a fondant lettering and her name EMMA at the bottom cake board.
I must say I think it is one of the nicest cakes I have made to date. It was tall + the 4 " topper. The bottom tier was vanilla sponge filled with vanilla buttercream. The cake was covered with red fondant and decorated with gold edible lace.