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.
Thinking Putty® helps build hand and finger strength through a fabulous tactile play experience with unique, unexpected properties and provides relaxing, yet stimulating interaction for anyone with sensory integration issues.
Thinking Putty® is non-toxic, won't dry out, and won't leave a sticky or slippery residue on your fingers, so it's great for stretching, molding, bouncing, tearing, popping and playing by kids and adults alike.
Tin with 1/5 lb. (3.2 oz) of putty & Glow Charger®
Stretch, Bounce, Pop, Tear, Sculpt
UV emitted from this product. Avoid direct eye or skin contact with light. DO NOT aim light at people or pets
Made in the USA from the finest materials around the world
Manufactured with the help of exceptional individuals with disabilities
There are over 100 varieties of Thinking Putty® with 30 different effects to discover!