The 5th annual solar-powered concert and green fair takes place from 11 a.m. to 4 p.m., Sunday, March 27. The event features live music by Michael P., The Wayback Machine, Spirit Familia and The Opposables. Speakers, games, kids’ activities, food, a freecycle.org “free-meet” and exhibits round out the fair. Kids can paint their own canvas bag and visit The Physics Factory, a modified school bus for hands-on science experimentation. Free. Visit www.solarrocktucson.com for more information.

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