Material: Made of high quality resin, non-toxic and odorless, free of radioactive substances, fluorescent effect. Fine workmanship gives you a smooth surface without sharp edges. Environmental friendly and energy saving: No electricity required, economical and energy saving. Absorbs and stores energy from the sun or other light sources to shine in a dark environment. Glow in the dark decoration: these decorative garden stones that glow in the dark after being exposed to daylight, ideal as aquarium gravel, glow stones in the aquarium , pond, yard, as landscape decoration, lighting a path or driveway. Reusable: Remove the package and put the pebbles under the sun or light, make sure each pebble absorbs light. Can be reused. Ideal for decoration: Ideal for craft lovers and as an ecological and bright decoration. Can be used for decorative vases, aquariums, aquarium landscaping, garden decoration, swimming pool decoration. Note: 1. Before using for the first time, expose the stone