Directly drawing from his background as a children’s entertainer, Jeromaia Detto capers through this slight but diverting hour of dress-up improv. Entreating his audience to anonymously submit aspirations for when they (finally?) grow up, the Australian systematically plucks these offerings from a container and performs a spontaneous playlet based on them using his vast array of costumes and props. Cheekily inveigling the crowd to be his supporting cast and sound effects, ranking the success of these skits on a clothesline of yays or nays, Detto proves himself adaptably quick-witted and game, even when similar suggestions have been submitted more than once.

The concept starts to stretch a little thin over an hour, as, without further variables to dictate the direction of the improvisation, some especially boring suggestions can flatline a bit. Still, he’s capably adept at encouraging those he plucks from their seats to regress to their juvenile selves. And he makes a comical virtue of any times when someone doesn’t quite intuit what he wants them to do. Furthermore, Detto bookends the show with an amusing bit of crowd immersion and ends it on a surprisingly poignant note, reminding us that we are all, and will always be, someone’s children.

Jeromaia Detto: When I Grow Up, Underbelly George Square, until 24 August, 4.20pm.