Find the 8 Pack: FIMO® Air 12.3oz. Wood-Effect Air-Dry Modeling Clay at Michaels. An easy-to-use air-dry modeling clay, FIMO Air is ideal for art, leisure, hobby and educational applications. Similar to china clay with a smooth consistency, creations using this material require no firing and hardened models can be reworked through filing, grinding, drilling, painting and varnishing.