I have been teaching a class on multi-sensory communication, with a focus on how smell and taste can be used for a new generation of communication media. Smell and taste are senses which are highly affected and cross related with the other senses such as vision and sound. This work, made in Japan, which I showed in the class changes the appearance and smell of a plain cookie, and the person can experience a different flavor.
(Source: http://www.youtube.com/)