Puzzle:Quicksilver Maze

In the late 20th century, American authorities banned the use of the element lead in the manufacture, and most specifically in the paint, of childrens' toys. Such legislation did not necessarily apply to every manufacturer in China, however, where many toys are made. Lead testing kits soon found their way onto store shelves and into concerned parents' hands. Toymakers produced toys made with other dangerous materials over the years. A popular maze toy, made around 1970, featured the element mercury--a liquid at room temperature--instead of traditional metal balls. Mercury is poisonous and quite dangerous if handled improperly. Discontinued now, the game still shows up on internet auction websites. Many communities and states recommend recycling mercury through hazardous waste recycling facilities.