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+. Get some bright ideas in a flash with neon yellow Lightning Rod Thinking Putty... Stretch it, bounce it, pop it, tear it, and sculpt it!