This portable desktop plasma orb from Project Blueprint is a top seller. A fun light-up science-inspired item, the Plasma Orb Light measures 6 inches in diameter. Orb is made of high-quality, thick clear glass and balanced on a tiered base made of 4 layers. Base is a bright translucent blue. Touch-activated plasma streams can be controlled as fingers move across the orb. Features an ON and OFF switch and requires 4 AAA batteries.