Having a plasma ball that reacts to touch is passe says Ubergizmo ; whats the trendiest thing in plasma balls is having a portable one, that clips on anywhere you like. And thats not it, the ball even reacts to sounds, rather than touch. Any kinds of sound will set off the change in patterns.

Available for $45 from Gadgets.dk ; the device draws power from a couple of AAA batteries. Take pocket plasma to parties and watch the lightning respond to the beat of the music. It even has a on/sound responsive mode/off switch. Pocket plasma has a 3" diameter and is 1.5" wide.