I don't know about other provinces, but "In Québec, the Consumer Protection Act prohibits commercial advertising directed at children under 13 years of age."
I wasn't aware of that. Does that include toys or child related products? One could say that movies have turned into one long series of product placements.
Example of prohibited advertising:
The Rappido Company is advertising a remote-controlled toy car like one seen in an
animated film. The advertisement is broadcast on Saturday morning on a TV channel for
children during a cartoon program. The ad is in animated film format and shows a young
boy who is thrilled to be operating his high-speed car. This ad would be prohibited.
But there's no mention of product placement. I imagine that would be hard to account for.