Uhome 100 PCS Glow in the Dark Pebbles Stones for Walkway Decorative Gravel Luminous pebbles for Your Fantastic Garden or Yard/fish tank decorate (green) Color: Sky blue in the dark; Milk white in the daylight Package Line a walkway, edge a flower bed or fill a planter with these unique acrylic pebbles After being exposed to daylight, these pebbles glow (sky blue) in the dark Glow lasts approximately two to three hours after full sun exposure warning! Not toy, keep away from children for chocking hazard!