Thinking Putty® is a high-quality, silicone-based putty that is safe, nontoxic and will never dry out. Proudly Made in the USA with the help of exceptional individuals challenged with intellectual & physical disabilities. 13.3g tin. Fun for ages 3+. Like a new car's finish, Cool Cobalt is a shiny true blue putty with a chromatic sheen..... Stretch it, bounce it, pop it, tear it, and sculpt it!