The playground at Hideaway Park is one of my personal favorite outdoor playgrounds in the city. It has a nice play structure, sandbox, wading pool, nice treed green space, toys strewn around including riding toys. It’s tranquil and never very busy. It’s a tad south and east from Pape & Dundas and only accessible from a laneway on one end and a fenced in dog park on the other.
Ask Siri or Google Maps for directions to Hideaway Park and they will both lead you to it. There is normally a porta potty in the park, but as of today it’s not there. I guess they remove it after the summer is over.