B.B. Comer Memorial Library kicked off its Summer Reading Program Monday with a performance by Didgeridoo Down Under’s William MacGavin. The didgeridoo is a wind instrument made from hollow wood. The first didgeridoos, played by aboriginal peoples in northern Australia an estimated 40,000 years ago, were made from fallen eucalyptus branches. MacGavin is DDU’s youngest member and has been playing and making didgeridoos for almost a decade, and founded his own didgeridoo crafting company, MacGavin Woodworks. He graduated from the University of Alabama with an architectural engineering degree, and is working on a “Science of Sound” program that combines STEM subjects with DDU.