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.
Warning: UV emitted from this product. Avoid direct eye or skin contact with light. DO NOT aim light at people or pets.
- Includes 1/5 lb. (3.2 oz) of Genuine Crazy Aaron’s Thinking Putty
- Collection: GHOSTWRITERS™
- Includes Glow Charger®
- Texture: Soft
- Made in the USA from nontoxic silicone and never dries out
- Stretch it, bounce it, pop it, tear it, and sculpt it!
- Fun for ages 8+
- Thinking Putty is manufactured with the help of exceptional individuals challenged with disabilities
This item was one of our first 350 items on our new site. We believe it is one of the top toys for kids this year! Each of these items has been carefully selected to ensure it is creative, innovative and long lasting.