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.