When the temperature reaches 86 degrees Fahrenheit, the clay will change the color. The temperature down or into the refrigerator, will restore the original color. It can bounce when it's a ball. Also can be free to do modeling, an educational toy and play tool for the growing kids, who needs a good time pass on their leisure time, travel time or other. Never be dry, it can be played again and again. It can be made to any shape what you want.