Gather around the table and watch as the magical effects begin. Turn down the lights and experience the electronic pulsating plasma waves of the Battery Powered Plasma Ball 3". This spherical piece sits atop a base and will send off bolts of light radiating from its center. Awe in the way the light rays follow your finger as you trace it along the rim of this cool-looking globe. Perfect for kids looking to learn about physics or just as a neat novelty item to display in your home. (Batteries and DC adapter not included) *Disclaimer: Our plasma ball features a sound-activated function but will only work with loud sounds or speakers. The sound sensor is underneath the base of this lamp.