Start here! http://www.ontario.ca/page/find-earlyon-child-and-family-centre https://www.eastendmomfriends.com/
Birchmount community centre has an Early On Monday to Thursday
I was going to say EarlyOn or even the Library has programs at times.
Search early on centres in your area I have a list where you can go to a free drop in daily at different centres. Also agincourt rec centre has great free leisure swim hours