Specifications: -Material: polystyrene (PS) -Color: Creamy (Day), Blue (Glowing). Delivery: 100 pieces -These pebbles absorb sunlight during the day and glow at night for 2-3 hours, with a very soft and pleasant glow. Safe in indoor and outdoor use, no electricity required and reusable. Versatile decoration: Perfect for DIY showing words and patterns. -Ideal for paths or flower beds, or for decorative vases, aquariums, aquariums, gardens, halls, nurseries, parks, etc. Note: - Before first use, place the stones in the sun/bright light for at least 4-8 hours. -Do not pebbles, when they are exposed to the sun, make sure that each of them absorbs enough sunlight -The longer it absorbs light, the brighter the pebble, the more radiant it will be.The darker the environment, the more the stones shine. - Avoid stones from children under 3 years old.Avoid choking and swallow.