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.!