Our bicycle boombox is a self-powered, portable loudspeaker. By fabricating this product, our youth apprentices learn skills and knowledge in soldering, woodworking, metalworking, product design, marketing, supply-chain, and fulfillment. About 40 youths, including teens on probation and in substance-abuse treatment, have prototyped and beta-tested our product over the past 3 years. Our waiting-list of 50 teens are waiting for our design to be made market-ready. We need engineering and product-design help to make that happen.