Last night's episode The Power of Three introduced the world to an armada of little black cubes. Obviously, such things are destined to become a wonderful piece of official merchandise much like the Time Lord psychic containters.
Until then, the Radio Times have provided a way for you to make your own! Clicking the Source link below will take you to a place where you can find printer friendly versions of the schematics below in both A3 and A4. By the way, we checked, these ones don't fire lasers beams at you. Often.