The “Cloud” is a motion-triggered nightlight plus speaker suspended from the ceiling. To be specific, it spits thunder and lighting if the wind blows. No kidding! The Cloud is controlled by Arduino, and can also function as a speaker that has a dynamic audio visualization system. That’s kind of like a light show synced to music. If you’re looking for a grouchy in-door cloud that puts up a light show while piping music, then Richard Clarkson’s Cloud is what you need.