Fascinations Metal Earth Farm Tractor 3D Metal Model Kit The Metal Earth models are amazingly detailed etched models that are fun and satisfying to assemble. Each model starts out as 4 inch square metal sheets and you simply pop out the pieces using wire cutters and follow the included directions to assemble your model. The Farm Tractor is a simple open vehicle with two very large driving wheels on an axle below and slightly behind a single seat with the engine in front of the driver and two steerable wheels below the engine compartment. This basic design has remained unchanged for many years. The model is 2.85x1.75x1.75 inches when built. Difficulty level: Challenging. No glue or solder needed.