StillCool 100pcs Glow in The Dark Garden Pebbles for Walkways Plants Fish Tank Decor Luminous Stones (Sky Blue) Easy to use---The pebbles laying on the edge of the walkway or flower beds, or use it for decorative vases, fish tanks, aquarium landscaping, gardening decoration, swimming pool decoration, bar decoration; villa gardening potting, parks and so on. The principle of light---The pebbles in the absorption of sunlight or light exposure, and they will glows for up to 2-3 hours or more in the dark environment. It can be used repeatedly.Their life expectancy lasts up to 15 years. Non-toxic environmentally---Non-toxic and tasteless, non-radioactive environmentally friendly resin non-mineral products. 100% Satisfaction Warranty---We offer a 30 days refund (defective, accidental damage, not satisfied) and 1 year warranty. If you are not satisfied with our products,you are always very welcomed to contact us. NOTICE---CHOKING HAZARD -- Small parts. Prohibit children from playing, Keep away from children for chocking hazard.