Features: Material: synthetic resin + photoluminescent pigment Size: about 2.2 cm in diameter Scope of delivery: 300 × pebbles Note: 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 least 2 to 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. Choking hazard due to small parts that can be swallowed. *Product Notes: The effect of the luminous stone is not obvious in the daytime/the place with enough light, and the luminous effect can only be reflected in a relatively dark, 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