Thames & Kosmos - Spy Labs Invisible Ink Pen and UV Light butterfly Suitable and fun for ages

Suitable and fun for ages 3 and up

Made from 100% natural rubber and hand-painted with natural pigments

and a sparkling waterfall cascading through the forest

Each block fits snugly on the train’s carriages

Illuminoceans takes readers on a journey of discovery through the most mysterious environments known to science

Thames & Kosmos - Spy Labs Invisible Ink Pen and UV Light butterfly Suitable and fun for agesAs a detective, you always need the right tools when you are on the hunt for evidence or reading secret messages. Ultraviolet light helps you uncover many hidden clues. Exchange top secret info with your friends and fellow agents using this high tech device. The pen uses a special ink that only becomes visible under ultraviolet light, like the one emitted by the flashlight on its opposite end. You can also use the UV light to find other objects and