POLYFORM-Model Air. This air-dry modeling clay is lightweight; durable; easy to smooth; and has exceptional pliability. It can be stamped; textured; molded; or sculpted and is great for jewelry; craft items; sculptures; school projects and more. This package contains one 2.2-pound block of Model Air clay. Available in a variety of colors (each sold separately). Recommended for ages 3 and up. Conforms to ASTM D4236. Imported.