1. Make sure the stone absorbs enough light during the day. Before first use, please put the stones in the sun/bright light for at least 2-8 hours.The longer it absorbs light, the lighter the pebble, the longer it will radiate. 2. Not suitable for children under 3 years old.Risk of choking due to small parts that may be swallowed. 3.the effect of luminous stone is not obvious in the daytime/place with sufficient light, and the luminous effect can only be reflected in a relatively dark place, and the luminous effect is short-lived.If you put luminous stone in the garden, it will absorb light during the day, and it will also emit light when changing from day to night.In the dark at night, the luminous stone does not have enough light sources to absorb, so you will not see a very strong night light at night, but you can turn on the light to illuminate the stone, then turn off the light to seea very bright night light. 4.Ease of maintenance: Due to the smooth surface, decorative pebbles have no surface erosion by dirt, so little maintenance is required. 5.DIY: You can create all kinds of designs to add a touch of shine to your DIY projects.These glowing pebbles are the perfect way to add that unique touch.