‘Unvaccinated or not fully vaccinated children under 12 must complete pre-entry, arrival and Day-8 tests, unless you have evidence that the child had a positive COVID-19 test taken 15 to 180 days (starting January 15, 2022, between 11 and 180 days) prior to arrival in Canada or the child is under 5 years of age.
For the next 14 days, the children must also:
not attend school, camp, team sports or daycare
not attend large or crowded settings, indoors or outdoors, such as an amusement park or sporting event
not take buses, subways, trains or other crowded transportation
not attend a setting where they may have contact with vulnerable people (e.g. long term care facility), including people who are immunocompromised, regardless of that person’s vaccination status or public health measures
stay in a place that allows the child to avoid all contact with any person that:
has an underlying medical condition that makes the person susceptible to complications related to COVID-19
has a compromised immune system from a medical condition or treatment; or
is 65 years of age or older
limit contact with others:
remain with their fully vaccinated parent or guardian, as much as possible
wear a mask and physically distance when in contact with non-household members
What your child can do for the next 14 days, as long as they wear a mask and physically distance from non-household members:
visit uncrowded public settings such as parks, beaches or going for a walk
gather with a small group of people from outside the household who are all known to be fully vaccinated
take uncrowded public transportation such as a taxi, or rideshare provided masks are worn at all times by all parties
accompany you to essential settings such as a grocery store or pharmacy
For 14 days following entry into Canada, you and any unvaccinated children under the age of 12 who travelled with you must:
maintain a list of the names and contact information of each person with whom the child came into close contact and a list of locations visited
wear a well-constructed, well-fitting mask in public settings’
I found the above info on the Government of Canada’s website .