MATERIALS: Our glow-in-the-dark pebbles are made of high quality resin, finely processed and polished to ensure that each pebble has no sharp edges. These pebbles are non-toxic, odourless and harmless to humans, fish, birds and plants. FLUORESCENT EFFECT: These pebbles have a fluorescent effect. After fully absorbing sunlight or light, they can automatically glow in the dark. They don't need electricity, they just need to be exposed to sunlight for a few hours to continue to glow. REUSABLE: Each bag contains colourful fluorescent stones. After unpacking, place these pebbles in the sunlight or at a light source to make sure they absorb the light well. Not only can they glow at night, they can also be reused, making them ideal decorations for you. WIDELY APPLIED: These luminous stones are suitable for many occasions. You can place them in aquariums, pavements, bike paths, flower beds, planters, aquariums and gardens to add a unique charm to the environment. Besides, you can also do creative DIY with these stones. ENVIRONMENTAL FRIENDLY AND ENERGY SAVING: Our light-emitting stones do not require electricity, so they have significant economic and energy-saving advantages. They are automatically recharged using energy from the sun or other light sources and continue to glow in the dark.