All international travellers, regardless of age, must carry acceptable identification when entering Canada. A passport is the only reliable and universally accepted travel and identification document when abroad.
Apply for an eTA before you book your flight to Canada. Most applicants are approved within minutes. However, some applications may take several days to process so don’t wait until the last minute.
Be careful about where and how you apply for an eTA. Companies that claim to offer help in getting an eTA do not operate on behalf of the Government of Canada. Many of these companies have websites and charge a fee to provide information and submit eTA applications.