Sculpey has been making polymer products for the last 50 years. This US company originally wanted to make a thermal transfer compound. It was meant to be the core of electrical transformers. The compound was a failure. A couple of years later, the compound was found to act like sculpting clay. The company mainly makes oven back clays. They have become a staple in the crafts clays department. They are perfect for both advance and intermediate clay artists. The company has also made basic molds for dolls and jewelries. Some of them look creepy like the flexible face molds. The different colored clays are perfect for these types of little craft projects. The embellish can also help you to texture your clay designs. The clay is very similar to Plasticine. Its key ingredient is polyvinyl chloride. It stays non toxic before and after heating.