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American Museum of Natural History.

Secret Message Writing Set

SKU
400006137487
$9.99
$8.99 Member Price

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

Features:

  • 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.