Copper is one of the most expensive metals these days and is famous for its great heat/electricity conducting properties. Copper is not attracted to magnets but super strong magnets interact with copper in a very unique way. If you drop a magnet made of neodymium down through a copper pipe, it will descend as if in slow motion. With increasing pipe or magnet thickness, the descent is further slowed down. Take a look at the video below and see for yourself.