Here are a couple pictures of the birthday cake I made for Brynn's birthday. This was before I was quite finished, but I forgot to take pictures when it was done. I had jelly beans falling out of the bag of "Bertie Botts" and put an "18" below the diadem.
For anyone not overly familiar with Harry Potter, here is a little description.
Each layer of cake represents one of the Hogwarts "houses" and has a scarf representing the house colors. On the very top is the sorting hat, next down is the diadem of Ravenclaw, Then we have the bag of Bertie Bott's every flavor beans, and on the very bottom is the cake that Hagrid made for Harry when he first learned that he was a wizard. On the right side you can see a Slytherin snake, and in the bottom picture you can see Harry's glasses. I also made a golden snitch, and a wand, but they aren't in the pictures.