The catalysts for life transitions come in many shapes and guises. For Bonnie Duncan, it was an underwear-stealing squirrel.

After years as a performer — dancer, acrobat, actor, puppeteer — Duncan found herself home alone full time with twin infants, a toddler, an abiding curiosity, and a rampant imagination. Feeling the urge to somehow get back into the world of performance, she struck on the idea of using her skill set to create her first all-ages solo show, and “Squirrel Stole My Underpants” was born. The roughly 35-minute production, in which Duncan portrays a lonely young girl named Sylvie, combines puppetry, mime, dance, and original music. Aimed at ages 3 and up, it premieres at Brookline’s Puppet Showplace Theatre Saturday through Feb. 3.