Soap box derbies send motorless cars down a steep incline. At one event, contestants make their cars look like cartoon ...

At Portland's annual soapbox derby, motorless cars race downhill pulled by nothing more than gravity. It's part race, part parade, with cars built to look like sharks, guitars and slices of cake.

The popularity of Soap Box car racing in the 1950s is being recalled at the National Museum of Ireland in Turlough Park, Castlebar, Co. Mayo. A vibrant red Soap Box car from the era – recently donated ...