Warning: this Plasma Ball cannot predict the future. But it may save your life if you find yourself at a fairground, your palm crossed with silver, and an expectant old lady staring at you. Let's start at the beginning: first discreetly flick the switch on the side of the Plasma Ball. Then gesture for the old lady to watch closely as streams of bluish-red light cascade into the sphere. Next run your fingertips over the glass ball (whilst muttering convincingly about 'tall dark handsome strangers').

The light streams travel directly to your fingertips in an hypnotic fashion, this is usually followed by a gasp from your client which announces that the illusion is complete.