A mind-boggling perspective of your favorites music performed with boomwhackers, buckets, and kiddie pools. Performance at Wieden Auditorium.

Riverside Public Market, 11 a.m.-3 p.m., at the Riverside Park Pavilion.

Oktoberfest and Pints with Professors, UMPI, on the lawn by the Campus Center and in the Owls Nest, 4:30-6:45 p.m. RSVP: Lisa Pucci, 768-9525 or lisa.pucci@maine.edu.

First Friday Downtown Art Walk. Several participants, including Wintergreen Arts Center, who will host artist Joanna Doughty, 6-8 p.m.