found at Gifts Australia
Set of 2 invisible ink pens Colour: Black Made from PS, PP and Stainless Steel Size 13cm x 2cm x 2cm Suitable for ages 6+ years This set of two Invisible Ink Pens with UV Light will bring the family endless entertainment and creative spy ideas. Discreet and unsuspected, the pens will keep valuable secrets safe as they look just like regular pens. They can easily be concealed to blend in until you are ready to write some top secret messages. Each special pen has a built-in UV light that can be used later to see the invisible ink. Great for kids parties, Halloween, goody bags, or stocking fillers at Christmas, every budding spy needs at least one set!