Pinewood Derby Q&A

Pinewood Derby? ok, I have been challenged by several people to a Pinewood Derby ( the little cars that are like 2 in x 1 in x 6 in ) (both for looks and a race), but I do not have much experiance with this stuff, anyone have any tips to make my car go faster or look better? any help is appreciate. Thanks :)

Pinewood Derby? ok, I have been challenged by several people to a Pinewood Derby ( the little cars that are like 1 in x 1 in x 7 in ) (both for looks and a race), but I do not have much experiance with this stuff, does anyone have any ideas for a good-looking car and/or a fast car (either one or two dfferent cars) anyone have any tips or designs to help me out? any help is appreciate. Thanks in advance :))