This was completed as a part of GISHWHES, the Greatest International Scavenger Hunt the World Has Ever Seen, and was constructed of both regular and blueberry Cheerios and Oreo O's breakfast cereal.
The finished work! I swear, my dining room smelled like Cheerios for a month.
I began with a rough sketch on a large sheet of paper.
Filling in as I went, I used a basic powdered sugar glaze as an adhesive to maintain edibility of the finished product (well, aside from the paper...).