SAVFY 100Pcs Man-Made Glow in The Dark Pebbles Stone for Garden Walkway (Multi Color) Material: Photoluminescent pigment + resin. Ideal decoration for landscape decoration, potted plants,lighting a pathway or driveway, gardens, crafts, etc. Approximately 100 piece set of man-made pebbles per bag. These pebbles absorb sunlight during the day and light up at night. And they will glows for up to 2-3 hours after normal daylight exposure. Eco-friendly pebble lighting that requires no electricity and no power. Use multiple packs for larger areas. After being exposed to daylight, these pebbles glow (blue) in the dark Please Note: Not toys, keep away from children for chocking hazard!