you can take simple game play (my son's current favourite game is Dragon City on facebook).
One of the dragon's is called a Mercury Dragon. This got us talking about Mercury the chemical and what is mercury poisoning.
Symptoms of mercury poisoning can be numerous and may occur either rapidly or over long periods of time. In general, symptoms occur and progress more rapidly the higher the dose of mercury encountered. Exposure to the various forms of mercury can result in some similar and some different symptoms. Symptoms can be grouped into three categories based on the form of mercury toxicity; 1) elemental and vaporized mercury, 2) organic mercury, and 3) inorganic mercury.