Popular in the 1950's and now popular again the rat rod looks much like an unfinished hot rod. And, that is what they are, unfinished cars that are built to run, but with only the bare bones and nothing fancy. Originally built to be functional, rat rods today are really show-off cars, as well.

While most models still reflect the look of the '50s and '60s, these automobiles can be all most any unfinished-looking car. Sure, the frame is there and the engine runs, but there may be no hood, the doors may not work and a top is optional. They are built or rebuilt for function, often have a lot of power, and often make a lot of noise.

Many enthusiasts remake these cars from old parts, starting with the body or frame, which can be purchased from pick-a-part or wrecking yards. These can be found pretty inexpensively, although the older the car, the more it may cost. Any brand of choice will do, be it Ford, Chrysler, Chevy or a foreign model. The body needs to be cleaned out and then it can be resized or welded into most any length. You can raise or lower the car, and redesign it by adding windows or different shaped fenders.

You'll then need to pick or build an engine. If this is all new to you, you may want to purchase a rebuilt engine that is ready to go. While it doesn't have to be the same model or make as the body, it does have to fit, or you'll have to adjust the frame to make it fit. You will need the right size driveshaft, or readjust one to properly fit. The wheels and rims can be anything you want and just add tires.

There are, of course, some requirements to the interior such as the steering wheel and seatbelts. But other things such as radio, door and window handles, and cup holders are optional. You can always add these things later. Paint is optional, too, and many owners of these cars don't bother.

Any vehicle can be a rat rod; not only a car, but a truck or motorcycle as well. There are many websites and online auction sites, featuring these vehicles for sale. And, there are many fancier clubs around the United States. They are often featured at car shows, or at least have a class in the show. You many find them in parades, too.

Like other car enthusiasts, the rat rod can be a fun hobby and perhaps, not as expensive as other types of vehicles. It is a great way to learn about cars and how they are built and a good way for fathers and sons, brothers and friends, to spend time together. They make a great project in a high school or college auto class and you turn out with something functional as well.