At the Repairathon at Withrow Park Farmers' Market, we met the woman who's bringing Boomerang Bags to Toronto. From their Facebook page:
"Boomerang Bags works to reduce the use of plastic bags by engaging local communities in the making of Boomerang Bags – community made using recycled mater."
They're running a workshop September 26 and looking for people to help sew, among other tasks. Details on their event page:
https://www.eventbrite.ca/e/boomerangs-bags-free-community-workshop-toronto-east-tickets-37398436731