Your minor children will need to obtain study permits and be prepared to pay approximately $15,000 each in annual tuition. They'll need to show another $10,000 to cover living expenses.
Since they are minors, you will need to find someone to act as their guardian in Canada (i.e. someone already living in Canada).
You and your husband can try to get a TRV to come visit temporarily, however you can't really accompany them to Canada.
No, you will not qualify for an open work permit.