LED fairy berries are sure to be the center of attention at your next party. They fade in and out very slowly, creating a moving firefly effect which can be absolutely breathtaking. When used collectively, the fading glow feature of the Fairy Berry offers the illusion of moving fairies. Large Mama Berries 1.5", Fairy Berries in colors & Fairy Berries on a String. Battery operated, mesmerizing & magical firefly lighting.!