Luna Piedra Seoul Green Project

Seoul Green Project has a new idea known as Luna Piedra, which also translates to “moonstone” in Spanish. These are no ordinary pebbles as they come illuminated with embedded OLEDs. You won’t need to plug pebbles into your wall power outlets to keep them juiced up though, since they are able to generate adequate juice via water currents using a very small generator. Apart from that, you won’t have the issue of this heating up and exploding suddenly, being easy on the environment as it leaves no polluting effluents.