Golf 100 Pcs Luminous Cobblestones Pebbles Stones Glow in the Dark for Aquarium Fish Tank Gravel Decorations,Fantastic Garden or Yard (Blue) Glow in the dark decorations - Perfect for lighting up walkways in your yard, decorating fish tanks, aquariums, potted plants, landscapes, waterscapes, or gardens. Adds a unique and personal decoration that looks amazing at night. No Electricity Required Glowing Rocks  These luminous pebbles glow stones absorb sunlight during the day and light up at night, and they will glows for up to 2-3 hours after normal daylight exposure. These glow stones are White in the day, but they are going to be Blue glow pebble rocks at night! Eco-friendly with Top Quality Material - No electricity needed! These glow pebbles absorb and store energy from sunlight or other light sources and light up in dark environment. Made of premium resin-durable, non-toxic & tasteless and non-radioactive. Fine workmanship and polish so there is no sharp edge. Large bag - Each bag comes with 100 pebbles to illuminate large areas such as gardens, flower beds, and backyard walkways. Each pebble is approximately 2-3 cm. Just place the pebbles where you want as long as they get sunlight and they will glow at night. How to make them glow? Put them under sunlight to charge for at least an hour. They glow longer if you charge longer. Made from Polystyrene (PS), non-toxic & tasteless, non-radioactive, Recommended for Ages 3+, Adult supervision required. Buy from the source, 90 Days Quality Guarantee; 100% High-Quality & Friendly Service and 24-hours Email Response. If any issue, please contact us freely to solve it. Money Back guaranteed.