Becoming a teenager involves a lot of firsts: Your first time driving, your first kiss, your first boy- or girlfriend. But what about your first rock concert? Not just as a spectator but as the onstage act?

Local band Purple Apple hit that first just over a year ago. Purple Apple is a trio of 13 year olds: Olivia Eigel, Madi O’Brien and Nonie Andersen. They’re joined by Eigel’s 25-year-old nanny, Devin Owens.

Saturday night they plan on blowing the doors off the Hideout Holiday Music Hour on W. Wabansia in Chicago.

Purple Apple recently joined “Eight Forty-Eight” in WBEZ’s Jim and Kay Mabie Performance Studio to play a set and to talk host Alison Cuddy about their music.