If you’ve ever wanted to experiment with low-melting-point metal alloys, for casting toy soldiers or other purposes, Rotometals, Inc is a great online resource. Their Low-Melting-Point Bismuth Based Ingot 158-190-ALLOY, for instance, can be melted in a pot of boiling water. If you’re concerned about lead or cadmium toxicity, their slightly-higher-melting 281-ALLOY contains only bismuth and tin. The also carry pure bismuth, indium, magnesium, and other metals and casting supplies in convenient quantities for small users.