My kids' middle school has a tradition among 5th and 6th graders that once a year each student creates a science model out of food. The kids love it, because they get to eat them after each presentation. But all we parents know how stressful science fair projects can be. Trying to create a meaningful science display from only edible materials is really a pain. We pretty much nuked the kitchen this Sunday and spent all day with this. But it's the last one! And it came out pretty well -- this is my daughter's "physics of the circus."
PS - TGFF - Thank God For Fondant, a material used in making fancy cakes that you can think of as edible clay. The materials here are graham cracker, Hershey bar, and sugar wafer stands, gum drop and lemon ball audience, frosted vanilla cake for the platforms, pretzels for the posts, licorice for the ropes, donuts for the cannon and the hoop, and fondant for the animals and people. And two full pounds of royal icing to glue everything together.
PSS - One of the things you discover about food is that despite the incredible amount of quality control on its composition and taste, there is not much quality control on its construction properties. Pretzel rods that always seemed straight enough turn out to be, when you come to actually build something from them, more warped than picked-over Home Depot lumber. Ditto graham crackers. Mini donut sizes vary tremendously. Licorice tensile strength that always seemed fine turns out to be woefully inadequate. And don't even get me started on gumdrop repeatability.