For citizens of most countries, working in Canada requires the appropriate visa. But you wont be working in the traditional sense of the word. However, you will need to enroll your children in school so you will need to be a "valid citizen".
Anyways, you will need to apply for a immigration visa. One of the most popular types is the Federal Skilled Worker Class Visa, which seeks to attract people with desirable skills and experience to contribute to the economy. Successful applicants receive permanent residence status, affording them all the rights of a Canadian citizen except the right to vote. Those who don't meet the criteria for skilled workers can apply for a regular work permit, which requires an offer of employment from a Canadian business. Economic immigration is also possible under an investor visa, which grants permanent residence to anyone with the intention of setting up a business in Canada.
Check out the Immigrating to Canada website
Immigrating to Canada for information on applications.
If you already have family in Canada, you can get them to sponsor you but if you don't, then the CIC is hugely backlogged and it is highly unlikely that your application will be processed even before the year.
Good luck