Renowned for its smooth consistency and brilliant colors, Claytoon Modeling Clay has been featured in many award-winning claymation productions. Preferred by sculptors, modelmakers, animators, and artists of all ages, it remains pliable and never hardens, even if left out for days, weeks, even months. Claytoon also offers creative fun for young children, for family activities, and in classrooms. The 1 lb clay sets contain four different colors (4 oz each), each individually wrapped for freshness, plus easy-to-follow instructions. Or choose individual 1/4 lb packages in a variety of colors. Van Aken Claytoon Modeling Clay is safe, non-toxic, and gluten-free. It contains no chemicals that can be harmful to children or pets.