Secret Message Writing Set


Your Purchase Supports Scientific and Educational Endeavors at the
American Museum of Natural History.

$8.99 Member Price

Two invisible ink pens. The cap contains powerful 'black light' beams which reveal secret messages.


  • Completely invisible in normal light, use the UV "black-light" in the pen cap to illuminate the message instantly.
  • 2 pens per set.
  • Batteries included.