Alex Modeling Clay is a great way for young artists to create colorful 3D models. The soft clay is non-toxic and easy for little hands to shape. It will never dry out, harden, shrink, or change shape so it can be used over and over again. No matter how you choose to shape it, our colorful clay will provide endless hours of creative fun! This package contains 17.6 ounces/500 grams of clay (24 assorted colors). Conforms to ASTM D4236. Recommended for ages 3 and up.