Well, these items are not actually made out of marshmallows--it just seems like it. Austrian artist Erwin Wurm has created an exhibit called "Wear Me Out" featuring items that people occupy such as sweaters, homes and odd Peep-looking... things (Peep/Human hybrids?) I'm not sure, but that may be the childhood home of the Stay-Puft marshmallow man. The installation is currently being featured on Design Boom and on display in Antwerp at the Middelheim Museum.
Link