Prop list:
Smile device (a device used to pull back smiles so that people can keep them) this will probably be made from rubber bands and a soft, hook shapped devise.
The horrific smile device (similar in design to the smile device, but features more fish hooks and wire)
razor blades
fake blood
soup (Bland green colour. Not meant to look at all tasty)
Medical/sergical masks (for the face changers)
Medicine bottles (to be used for the Smile-a-while medication)
Saussure's semiotics would review some of these items as holding meaning to an audience, razor blades for instance are linked to the icons of teen suicide, and the "smile"