Field's metal is a low-melting-point alloy, which will melt in hot water. It's named after Simon Quellen Field, who runs scitoys.com, a great site for educational and scientific toys and kits. He sells this alloy in the form of lengths of metal-filled plastic tubing, which you can easily melt or cut it out of.
Source: Simon Quellen Field
Contributor: Simon Quellen Field
Acquired: 13 February, 2007
Text Updated: 14 February, 2007