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 Genuine Crazy Aaron’s Thinking Putty. Made in the USA from nontoxic silicone and never dries out. Fun for ages 8+
Made in United States of America