NEVER HARDENS – Pepy Plasticine oil-based, non-drying modeling clay remains pliable and does not dry out. Package of 4 colors weighs 1 lb. SIMPLE TO USE – Perfect for modeling, sculpting, stop motion animation, prototypes, and more! High-density clay can be shaped to hold fine detail. SULPHUR FREE – Ideal for creating molds. EASY CLEANUP – Non-crumbling, oil-based clay can be easily cleaned up with soap and water. SAFE FOR KIDS AND ADULTS - Pepy Plasticine is non-toxic, CPSIA-certified, and Gluten-Free. Free from most common allergens including: latex, dairy, eggs, peanuts, soy, tree nuts, shellfish, fish & sesame. MANUFACTURER RECOMMENDED MINIMUM AGE: 3 Years Pepy Reusable and Non-Drying Oil-Based Plasticine Modeling Clay, Primary Colors, 1 Pound, Sulfur-Free & Non-Toxic, Great for Kids, Beginners, and Artists, Perfect for Arts and Crafts Projects