A glass ball, with some inert gasses at low pressures inside it, with an often ugly base, and a round thing in the middle with electricity running through it to cause the gasses to become the fourth state of matter, plasma. This is possible without melting the glass and wasting a lot of electricity by having a very low pressure within the glass thingy.
Whoa, that plasma ball is shiny. Now I'll stare at it and put my hands on it for hours!
by DLG June 29, 2003