Follow the tutorial :-)

You start by loading a box from primitives and coloring it blue.

Then load a magnet for this box, and yes that magnets base is yellow.
Then put the magnets base in the middle of the blue primitive box.
 Use a wireframe mode, and a side view to do that.
The box is blue, the magnets base, invisible as it is inside the box is yellow.

Have a nice day.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!