He holds the used toy tractor in his hands. “See this?” says Hugh Epps, 44, holding the toy with both hands over his work-room sink. Its blue paint, all but erased by wear and tear, has been replaced ...

They’re becoming more prevalent in manufacturing, but if you’re still wondering if you need a 3D printer at home, there’s just one other question you need to ask: Do you have any old die-cast toy cars ...