3-5mm Resin Glow in A Dark Pebbles Rocks Sand Accessory DIY Decorative Multipurpose for Garden Smooth Surface , White 50g.Decorative Sand Gravel is made of resin, luminous, smooth surface, shining look, lightweightMini Glow Rocks Stones used for decorating your fish tank, and vases, and can be also used as DIY craft materials, garden decoration, swimming pool decoration, bar decoration, etc.leave all the gravel in the sunlight for about half an hour, they will glow in a completely dark space for about 2 hoursDecorative aquarium small sand stones diameter approx 3-5mm, reusable, perfect floor decoration indoor and outdoorIf you want Luminous Glowing Sand to keep growing indoors or out, install a light above them and glow repeatedlyResin Glow in A Dark Pebbles 3mm 5mm Accessory. Aquarium Glowing Stone Fairy Garden Decoration. DIY Decorative Rocks for Garden Pathway Decor. Luminous Stone Gravel Pool Yard Garden Decor. Diy Craft Sand Materials Fish Tank Decoration. [Function]Mini Glow Rocks Stones used for decorating your fish tank, and vases, and can be also used as DIY craft materials, garden decoration, swimming pool decoration, bar decoration, etc. [Resin Material]Decorative Sand Gravel is made of resin, luminous, smooth surface, shining look, lightweight [Feature]Decorative aquarium small sand stones diameter approx 3-5mm, reusable, perfect floor decoration indoor and outdoor [Easy to Use]If you want Luminous Glowing Sand to keep growing indoors or out, install a light above them and glow repeatedly [Glow In The Dark]leave all the gravel in the sunlight for about half an hour, they will glow in a completely dark space for about 2 hours