Good points explained ! The light is very important. Never use your camera flash, use at least (if you don't want to make or buy a lightbox) one daylight bulb lamp (neutral lamp, around 6500k reference if I remember correctly), not too close (the colors will appear saturated) from your mini but not too far (too much shadow).
On your camera, use the macro mode, it's commonly represented by a tulip symbol.
If you camera 's got problems to focus in macromode, use a neutral background (for example, a grey or blue mouse mat, a piece of cardboard or sheet of paper, etc...) right behind your mini, so your camera will not be disturbed by the background.
Last thing, as you're probably taking pictures for internet purpose (galleries, forums, etc...) don't forget to resize your pics. First, crop the pic to keep the model only (with some borders), and then, reduce the pic size to something between 500x300 and 800x600pixels. It 's large enough for screen displaying, and it will naturally smooth the final result.