1. HIGHEST QUALITY GLOWING PEBBLES. These pebbles are made of the highest quality of resin and have a very high concentration per pebble, meaning they glow bright, especially when they are in the sun or bright indoor light; 17×22MM. 2. SAFE. These stones are nontoxic and nonradioactive. They are to use for any decoration or scene. The pebbles however are small enough to be a choking hazard for small children. 3. VIBRANT DECORATION. These glow stones in the dark are sure to add a fun, colorful touch to any indoor or outdoor area They are a great decorative addition to a fish tank, flower bed, fairy garden, pathway, pond, or driveway. 4. PERFECT FOR OUTDOOR AND INDOOR DECORATIONS. These pebbles make it easy to add a neat night feature to any scene. Whether you are brightening up your fish tank or illuminating an outdoor walkway.