【New, Unopened】Pyon Pyon Clay - Experiment, Research, Educational Toy, Super Ball, Clay, Experiment Kit, Fuji Cosmo Science Product Description Why does it bounce and stretch, even though it's clay!? A mysterious clay made of silicone that bounces and stretches. You can make other colors by mixing them. With a detailed instruction manual, you'll understand how it works. <Set Contents> 3 colors of clay, Instruction manual Thank you for viewing. I am selling this to organize my collection. It has been stored in a cardboard box in a new, unopened condition. Although it is new and unopened, there may be some minor scratches or scuffs on the outer box due to being stored at home by a private individual. Please check the photos. Please refrain from purchasing if you are sensitive to such issues.