The Mosquito. A device that was designed to discourage younger people from loitering outside of buildings. It is based on the fact that older adults exhibit presbycusis, whereas adolescents do not. And here is a news article related to the controversy over the use of such devices.
The rubber hand illusion. An illustration of how the rubber hand illusion can be induced.
Change Blindness. Several examples of change blindness from the laboratory of Dr. Ronald Rensink.