Tesla's Lamp
Originally patented by Nikola Tesla in 1894 following his experiments with high voltage currents, the plasma ball is a colourful way of observing electrical discharges. Control the filaments using your finger by moving it around the glass. This lamp also has a Vibration mode, so place it somewhere prone to vibration like speakers, and watch it dance away.
Powered by USB cable or battery.
20cm Diameter
You might also like to see a smaller version of this Plasma Ball