More specifically, you can send the gift but the people will not be able to redeem them. They end up stuck with a useless email. What you can do is send iTunes gift cards. These can be sent electronically and can be purchased for one country's specific store, in your case USA, from another country.
A passport is a travel document, usually issued by a country 's government, that certifies the identity and nationality of its holder for the purpose of international travel.Standard passports contain the holder's name, place and date of birth, photograph, signature, and other identifying information. passport is a document certifying identity and nationality; having the document does not of itself grant any rights, such as protection by the consulate of the issuing country, although it may indicate that the holder has such rights.
In general, a passport is required to enter Canada and return to the United States but there are some exceptions. In some cases, it is possible to present evidence of U.S. citizenship and a photo ID or some other WHTI-approved document such as a FAST card. Read through the answers to the visitor-submitted questions below and find the information you need to better prepare for your trip to Canada.