This Gemini-nominated children's show made by The Learning Channel, aired on TVOntario. The show was created by Jed MacKay, and went on to win the Alliance for Children and Television's Best Pre-School Program Award. The show aired from 1989 to 1995.
Although the filming location is listed in IMDb as Lindsay, Ontario and a building on Cambridge Street North can be seen in the opening, it is likely the interior of the show was filmed in a studio. (Observe the layout of the interior. It doesn't quite line up with the window and outer building.)
See the Cambridge Street North building (C.L. Baker building) at the 1 minute mark of the show's opening: