I read this article in PopSci with making trick spoons. I can't find the article online so here goes the jist of it:
The alloy consists of 51% Indium, 32.5% Bismuth, and 16.5% tin. Theodore Gray, the author of the article, uses this alloy to make trick spoons that will melt in a cup of tea. This alloy is non-toxic so if you manage to get all of the liquid out of your drink you can drink it, not that I would. Indium melts at 314ºF, Bismuth at 520ºF, and Tin at 450ºF. This alloy has a slight tendency to stain glass. Indium is the most expensive element to buy. I've seen it for $70 a pound. Expensive, definately.
If you try this, it's in the February of 2005 issue of Popular Science. Also check out
http://theodoregray.com/PeriodicTable/ . That's the guy that wrote this article. If you have any luck with this tell me. I want to try making metal alloys that'll have some cool property. I've only melted aluminum before.
Enoy!