2. Add the Wheels and Roof
Put a V-shape on its side at the rear. Add two large and two small ovals for the wheels. Place a U-shape on its side through the rear wheel. Attach a slanted rectangle to an angled diamond. This forms the "cowcatcher" in the front.
Connect an upside-down bowl, two J-shapes (one backward), and two lines to form the smokestack. Place a long curved line under the smokestack and under a half circle (the bell cover). Form the roof by attaching curved lines.