BeFuture(TM) Blue DIY Glow in the Dark Gravel Pebbles Stones for Garden Aquariums Fish TanksYard with Keyring ReviewbP PP eFuture(TM) Blue DIY Glow in the Dark Gravel Pebbles Stones for Garden Aquariums Fish TanksYard with Keyring PCondition: brand new; Material: Photoluminescent pigment + resin; Size: approx 2 - 3cmPPebbles are about the size of cooked lima beansPGlow-in-the-dark pebbles mark a path, highlight a flower bed, decorate fish tanks, etc.