4" Invisible Ink Ghostwriters™ Thinking Putty
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.
- Includes: 1/5 lb. (3.2 oz.) of Thinking Putty, Glow Charger®
- Color: Color: Black with Multi-Colored Glitter | Glow: Red/Blue/Green Cosmic Glow™ |
- Features: Scuptable, Tearable, Soft Texture,
- Materials: Non-toxic silicone
- Ages: 8+
- ⚠️Warning: Choking Hazard. Contains Small Parts.
- Never dries out!
- Stretch it, Bounce it, Pop it, Tear it,
- Proudly made in the USA.
- Manufactured with the help of exceptional individuals challenged with disabilities.