Try Metal clay! It's very small particles of metal (silver, gold, bronze, or copper) mixed with an organic binder and water. It can be shaped like any soft clay, by hand or using molds. After drying, the clay can be fired using a kiln, a handheld gas torch, or on a gas stove. The binder burns away, leaving the pure sintered metal. Shrinkage of between 8% and 30% occurs (depending on the product used). Alloys such as bronze, sterling silver, and steel also are available.