The Canadian Government issued the following statement regarding children now required to have their own passports, too.
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The International Civil Aviation Organization (ICAO) has recommended a policy requiring every individual who travels by air to have his or her own passport. Canada supports this recommendation as a member country of ICAO.
Therefore, effective December 11, 2001, Canadian children who travel will need their own passport. This is to combat the traffic of millions of children around the world who are often sold into slavery, child prostitution or worse. By ensuring that all children who travel have their own valid passport with a photo and other identifying information, their protection is increased.
However, if you hold a valid Canadian passport issued before December 11, 2001, that bears the name of your child, the passport remains valid for you and your child until it expires