The royal children were taken to the Beacon Hill Children's Farm by their nanny while mum and dad enjoyed a night away in the old gold rush town of Whitehorse in the Yukon.
The trip was made public by Victoria Tourism, which tweeted George and Charlotte's secret escape.
The tweet, posted during the morning local time, was public for only half an hour before it was deleted.
While at the petting farm, the children, who are are staying at Government House in Victoria, capital of British Columbia, reportedly saw goats.
Source: AAP