The Bat Fairies use the ruin as a hiding place. There they keep the stolen crystals. The crystals bring light into the dark ruin. A flickering light shines through the the ruin's rock holes decorated with transparent crystals and illuminates the ruin. The intensity of the light in the Bat Fairies ruin increases, the more rock parts are replaced with transparent crystal parts! The light module requires 1 x 1.5 V micro battery (AAA). Dimensions: 40 x 14 x 32.5 cm (LxDxH)