Crazy Aaron's Thinking Putty, 3.2 Ounce, Liquid Glass Crystal Clear. Turns Cloudy With Use Changes Back to Crystal Clear. ASTRA Best Toys for Kids 2018 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 3 and up Includes 3.2 oz of Genuine Crazy Aarons Thinking Putty Thinking Putty is made with the help of exceptional individuals challenged with disabilities