It's the Larynx!!
All of the cartilages are made from either air-clay or this Crayola stuff called Model Magic. The muscles are wiki-stix (waxed yarn) and/or red fruit roll-up. I am proud of my muscles, I think they look the most realistic and I don't think anyone else thought to use the materials I did!
So next time you've got a question about the Myoelastic-Aerodynamic Theory of Phonation or the Self-Oscillating Expansion on that theory, stop on by and I can point out the structures to you!
(the bottom two pictures are missing the epiglottis and the top one is the finished larynx but I did cover the base so it had a more polished look to it, I just forgot to take a picture of it and now they're on display at school)