For his Lightning McQueen room, my son needed a race car bed. I wanted a bed that would fit a twin mattress, and the molded plastic car beds from Toys'R'Us and the like were all made for toddler mattresses. Plus, they weren't really Lightning McQueen, just red race car beds.
Hubby to the rescue! He probably was wearing his Superman shirt that day haha! He laid out a large sheet of 5/8 inch MDF and I covered it in wax paper. The wax paper became my pattern paper. I used my son's large talking McQueen toy, the DVD cover, and a scene from the movie (which we left on pause), and I drew out the entire side of the car. The only area I redid a couple of times was where the driver and passenger window go. It had to be high enough so he wouldn't fall out of bed, but low enough to allow easy bed changing access and for him to easily get out of bed. Plus, it had to look sporty without looking like a convertible.
End result: We all love it! And, most important, when my son walked into the room to see it for the first time, he said, "Lightning McQueen!"