A harried-looking adventurer-dad and his five-year-old boy approach a shop that displays metal ingots in its outdoor windows, heavy bars of copper and titanium, gold and platinum and osmium, and vials of colored powders sealed and then Vacuum-purged.  All lie behind simple glass, not guarded.  Pure metals are not expensive; alloys are.

A harried-looking adventurer-dad and his five-year-old boy approach a shop that displays metal ingots in its outdoor windows, heavy bars of copper and titanium, gold and platinum and iridium, and vials of colored powders sealed and then Vacuum-purged.  All lie behind simple glass, not guarded.  Pure metals are not expensive; alloys are.