Features: Material - Luminous material + polystyrene resin. Each is about 0.3 by 0.5 cm, 0.025 grams. Simple and convenient - no power needed. Put them in sunlight or light to absorb light, and they glow. Long life - absorbs and emits light and can be reused for many years. Auto-glow in a Dark Garden - absorbs and stores energy from sunlight or other light sources and illuminates in a dark environment. Luminous stones absorb sufficient sunlight or other artificial light during the day and glow at night or in any other dark environment. If it's not bright enough, please use another light. Safe and environmentally friendly - Made of polystyrene, non-toxic, radiation-free, tasteless. Fine workmanship, polished, no compatible with sharp edges. Suitable for indoor and outdoor decoration - paving on the edge of walkways, flower beds or as flower pot filling, home decoration, parks, water features, flower POTS, greenways, yards, lawns, fish tanks, aquarium, crafts decoration. Package includes: 1000/3000/5000/10000/30000 PCS noctilucent sand We maintain a high level of responsibility for our customers and are as responsive as possible to the needs of our guests. If you have any questions about our products, please contact us in time, we will solve it for you immediately! Due to the different display devices, the color of the products may have some discrepancies, hope you can understand. Due to the different photo shooting angle, the actual shape and size of the product may not be consistent with the picture, please refer to the description of the product size, everything shall be subject to the physical object received. Thank you for your purchase, we sincerely wish you happy every day.