No, you can't just renew your kids' PR statuses.PROSnCONS said:Is there any possibility to renew PRs (even for kids alone)?
Will there be any difference if we travel to Canada and try PR renewal while being there?
Will they allow us to enter to canada?
You don't qualify for renewal. If you are able to enter Canada without being reported, you will need to spend 2 years here without leaving to once again meet the Residency Obligation.
Yes, you would be allowed to enter Canada. However, if you are reported at the border and do not have valid H&C reasons for not meeting the RO, you will lose your PR status.