STAYS WORKABLE UNTIL BAKED: Does not air dry. Remains workable and flexible until it is baked in your home oven - no kiln needed. Store extra clay to use later. DETAILED SCULPTING: Features fine tooling and detailing characteristics. Does not “fill in” after tooling. GRAY COLOR allows for shadows to be seen more easily which provides maximum detail to be achieved in your sculpt. This is the firmest clay in the Super Sculpey family. FUN TO PAINT & FINISH: After baking, it can be sanded, drilled, carved and painted with water-based acrylic paints. Create endless works of art. Ideal for all skill levels. SAFE & NON-TOXIC: Polymer Clay - This polymer clay is safe since it conforms to ASTM D-4236 and EN 71 AP safety standards to be non-toxic. Made in the USA.