My friend Jen and I made this for the bridal shower of our friend Brianne. The base is just your basic tiered wedding cake idea. The TARDIS itself was made from Rice Krispie Treat. The blue walls are covered with Wilton Sugar Sheets Edible Decorating Paper. The paper cuts like a dream. It's edible only in the sense that it is non-toxic; I would rather eat actual paper. The paper also wants to curl up and detach itself after a few hours.