Scientific American walks you through how to build a balloon-powered car using basic supplies (bit.ly/car-balloons). All you need are a few simple supplies, something to act like flippers ...

This is our next project,'" said Brown, of Kalamazoo. Originally from Oxford, England, hot rod mechanic Braithwaite designed the 4-year-old Big Banana Car from a 1993 F-150 with added fiberglass ...