PORTLAND — Eepybird, aka Fritz Grobe and Stephen Voltz, will kick off the Portland Performing Arts Festival on Thursday, June 28, with a live demonstration of its “Extreme Diet Coke & Mentos Experiments.”

The free performance will be at 6 p.m. in Monument Square at Congress and Elm streets. Rain date: 6 p.m. Friday, June 29.

The festival, a new four-day event running through July 1, will feature eight performances of nationally renowned artists in classical music, jazz, dance, theater and performance art. 

Grobe and Voltz are the creators of famous online videos exploring the explosive combination of Coke and Mentos — turning 100-plus bottles of Coke Zero and more than 600 Mentos mint candies into a choreographed display of 25-foot tall geysers of soda. 

Eepybird specializes in creating viral videos that explore how everyday objects can do extraordinary things, from making ping pong balls float in the air above hairdryers to transforming 250,000 sticky notes into waterfalls of color.

The duo has been nominated for two Emmy Awards and won four Webby Awards; and its viral videos have been seen more than 150 million times. This has led to appearances on “The Late Show with David Letterman,” “The Today Show,” “Ellen” and “Mythbusters.”

Eepybird has set four Guinness World Records and appeared in videos for Blue Man Group, Barenaked Ladies and Weezer.

For more information on festival programming, visit www.portlandfestival.org. Tickets to other festival events are available through PortTix at  tickets.porttix.com.