Here is the castle Cake I made for a friend. The cake was vanilla with cookie dough filling and french buttercream frosting. I found a castle cake tutorial over here and made the towers out of paper towel rolls and wrapping paper tubes. Then I "glued" cake cones inside them, covered them with fondant and covered sugar cones with pink fondants and pink sanding sugar crystals.
I was going to make the flags out of fondant but decided to use my silhouette machine pens to draw the birthday girls name and age on the flags before having the machine cut them out. I am starting to get the hang of that machine more and more. I just need more excuses/projects to play with it.