Bikes that Rock

Bicycle advocate and rapper Paul Freedman (a.k.a. Fossil Fool) gets his kicks by turning pedal power into sound waves. As emcee of the Pedal Powered Stage at the Maker Faire, Make magazine's annual event showcasing creative inventions, Freedman asked audience members to take turns riding specially modified "soul cycles," powering the microphones and speakers onstage. Freedman's company, Rock the Bike, promotes safe bike travel and sells cool products like bike-powered blenders.