Skip to content

Crazy Aarons Thinking Putty - 4" INVISIBLE INK


Crazy Aarons Thinking Putty - 4" INVISIBLE INK  - GHOST WRITERS

This is the larger, 4 inch tin from Crazy Aaron’s.

Invisible Ink - Discover the magic of a UV light that works just like blue ink to write, draw, and doodle on this vivid green putty.

With GHOSTWRITERS - hidden codes, secret notes. Disappearing messages. These are the inspirations behind Crazy Aaron's new Ghostwriters. Use the included Glow Charger to write with light and then watch in amazement as your words, drawings, and doodles vanish like magic.

  • Bright neon hues and soft texture
  • High-contrast colour change for awesome pen-like effects
  • Perfect for drawing, writing, and playing games


Often used to encode top-secret information, invisible ink has a long and interesting history dating back to 4th century BC. There are all kinds of ways to make and read invisible ink (like heat and lemon juice), but our Invisible Ink Thinking Putty® uses ultraviolet light to mimic blue ink on a sheet of green paper. Write with the Glow Charger® and watch with wonder as your words evaporate into thin air.'

Please note that the tins are not full, in fact don't fill half the tin.  These are made in USA and the nature of the product, not a fault.  As a result in transit the putty can distribute around the tin making it look empty.  It may look as if its leaked out but it wont have.  You just need to gather up the putty into a form again.  

Not suitable for 3 and under due to choking hazard.  

Materials: Non-toxic silicone
Ages: 3+
Never dries out!
Proudly made in the USA.
Manufactured with the help of exceptional individuals challenged with disabilities.