Commonly known as quicksilver, mercury is the only metallic element that is a liquid at room temperature. It’s a heavy, silver-colored metal that has been historically used for temperature gauges and electrical applications because of its conductive properties. Just like its namesake, Quicksilver Thinking Putty is a saturated silver color with dark streaks throughout. Use the included magnet to discover the unique properties of this putty for yourself. Each tin includes 1/5 lb of Quicksilver Thinking Putty – a huge handful for tons of fun – and a 1″ x 1″ ceramic magnet. PLEASE NOTE: While Quicksilver Thinking Putty is inspired by the element, it does not actually contain any mercury.