To achieve the best results as to the place near the light source.It absorbs light，glowing in the darkness.Unique Dinosaurs shaped fluorescent stickers，Perfect decals for your kids room!Easy to stick to your ceilings and wallsA sweet gift for your kids.Safe removable and reusableSelf-adhesive pads includedTo test， take one piece and leave it in direct sunlight for 1 minute， then take it somewhere dark and it will glowExpose your colored stars to a light source for 1 minute and watch them glowBreak off a tiny piece of the adhesive and apply to the back of each.Package Included:1 x Pack Glow dinosaurs (9pcs)