In a new addition to the 30-plus -year-old Green River Fest, Signature Sounds has found the best local bands with musicians ages 18 and under to be featured performers Friday night on the Next Wave Stage.

But wait there’s more! Friday night admission will be free to anyone under age 18.

Sponsored by the Valley Advocate, the five winners of The Next Wave competition will each play a set July 14 on, where else, the longrunning festival’s new Next Wave Stage. And later, each band will perform on Valley Advocate Sessions, a weekly mini concert filmed by NCTV and audio recorded by Signature Sounds. Every Friday, the Advocate posts a new four-song concert by local up-and-coming bands (and some awesome better known acts).

So who’s playing the stage on free-Friday?

Paper City Exile (South Hadley): 5:30-6 p.m. This alternative rock band from South Hadley features Dan Conway on vocals and guitar, Zeno Quinn, bass and Jackson Silverman on drums. [Check out the band’s earlier performance on Sessions, here.]

Kalliope Jones (Shelburne Falls): 6:15-6:45 p.m. This vocally driven, soul-infused, indie rock trio from Shelburne Falls, has Alouette Batteau on vocals and drums, Amelia Nields Chalfant, vocals and bass, and Isabella DeHerdt on vocals and guitar.

Court Etiquette (Northampton): 7-7:30 p.m. This indie-rock and roots outfit from Northampton, includes Isaac Bond on bass, Gabe Brodeur vocals and guitar, Ethan Grant, keyboards, Chris Raphael-Reily, drums and Charlie Ryan on guitar.

Nomad vs. Settler (Brattleboro): 7:45-8:15 p.m. Hailing from Brattleboro, VT, this indie-rock group’s lineup is Owen James on bass, Rei Kimura, vocals and guitar, Archer Parks, guitar and Milou Rigollaud on drums.

Parlicium (Ashfield): 8:30-9 p.m. This indie rock band from Western Massachusetts features Kim Chin-Gibbons on guitar, drums and vocals, Tobias LaMontagne, vocals, guitar and drums and Lane Moore on bass, guitar and piano.

Next Wave Stage at Green River Festival: Friday, July 14, 5-11 p.m. Greenfield Community College. Free for anyone 18 or younger. Otherwise, Friday is $34.99. Green River Fest is a three-day music extravaganza with balloon rides, food, and vendors. For more information go to greenriverfestival.com.