I'll take a first shot at answering that.
PIPEDA does not recognize age as an issue for the collection, use, or disclosure of personal information. Citizens of all ages are protected under PIPEDA.
In the B.C. act, a minor who is capable of exercising his or her rights may legally do so under the act, and if the child is not capable, someone acting in the best interest of the individual may act in their capacity. Children, then, are protected already under the B.C. act, and personal information of any citizen, regardless of age, is currently protected under PIPEDA.