My latest favorite project!  We read several of the Mo Willems Pigeon books and thought of our own vehicles.  I traced the basic shapes (head, neck, and body) on blue and (eye) white construction paper.  The kids cut them out, glued them down and added wings and legs and eye ball.  Here's the printable: http://www.growinginprek.com//Don't%20let%20the%20pigeon.pdf.  I drew a speech bubble before making copies.