This pen writes like normal, but the ink disappears when heat is applied and can be made to reappear when placed in the cold.
This invisible ink pen has a built-in UV light in the tip to see what you're writing and the invisible writings that you receive in return.
Forget Hot Chocolate on a Stick, because this cool new Hot Chocolate on a Vintage Silver Spoon is the more civilized way to make a cozy cup of hot cocoa in the... More
