It’s the dead of night; everyone is tucked up in bed and the owls are-a-hooting. So it’s time to break out the Glow Graffiti! Powered with UV light you can write, stencil and draw rude pictures to create your very own glowing light show. It’s like very complicated vandalism except much prettier and you won’t get nicked by the police doing it. This really is a gadget of mind-boggling genius, perfect for parties (or if your nocturnal) and will have your friends intrigued for hours to how it all works. If we did tell you the super-top secret information to how it works we’d have to kill you.