This is our Chinese Firework Rocket pinecar. Because of the overall size, we threw away the block that came with the pinecar kit, and turned the whole thing on a lathe from a chunk of redwood 4x4. (We have pretty flexible rules in our Indian Princess group.)
I retained the original wheels, axles, screws and wheelbase dimensions, to be as fair as possible, even though we're not really there to win the race.
The "flames" at the back are just a bundle of ribbons, which were removed before the race. The Mushu on top is a birthday cake decoration, which was easily available when we built the car, it being the year that the movie came out.
It was a great project, and gave me a chance to teach my daughter a little about using a lathe, as you can see in the picture, along with the usual sanding ("always with the grain!"), spray painting, masking, etc.