you build them or buy one someone else used to race.
Pinewood Derby cars are popular for young boy scouts or anyone who is interested in soap box car racing. You can purchase them quite cheap online and they are sure to be a fun way to spend a day or few.
soap and a box
Try this site for more information, an excerpt and the site:The Soap Box Derby is a youth soapbox car racing program which has been run in the United States since 1934. World Championship finals are held each July at Derby Downs in Akron, Ohio. Cars competing in this and related events are unpowered, relying completely upon gravity to move.* http://en.wikipedia.org/wiki/Soap_Box_Derby
From scratch in your garage with minimal help from others is the short answer, BUT!... The soap box derby organizers realized that people don't have the skills or the tools, so they sell a kit.
Tryto verify the year of the Festiva. They were not made after 1994. first of all buy a better car and the festiva was a for lack of a better word a soap box car
Ashley Tisdale
dude you can't make e'm, you have to buy them.
Here are a few sites to help out:The types of wheels used on soap box derby cars have changed significantly since the first racers coasted down that hill in Ohio in 1934. Buying the appropriate wheels for your soap box car will result in more stable handling and steering, not to mention an improvement in aerodynamics.* http://www.ehow.com/how_2082557_buy-wheels-soap-box-car.htmlIf you are building an official racer, which will be used for an authorized Soap Box Derby race, your wheels will need to follow strict specifications. As there is a limit on size, shape and construction of an official racer, there is a demand that the wheels be officially approved Z-Glas wheels. However, if you are building a racer for fun, or if you want to start at an amateur level and get in some practice before going for the big time, any wheels will do. But some are better than others, and if you're serious about going for the big time, you'll want to get the best wheels you can for your practice sessions.* http://www.essortment.com/home/soapboxderbyc_sfwk.htm
you can use fishing weights and glue, or buy special weights
If you are talking about a home made wooden down hill gig for one young passenger, try using a set of soap box derby wheels, just make sure it has brakes of some kind.
One can buy a car roof box in the High Street at stores such as Halfords. If one prefers to shop online, one can buy a car roof box via Amazon and also via eBay.
If you wish to.