CIT 0007 E: "Colour photocopy of all pages in your passport(s) or travel document(s) during your five (5) year eligibility period, including the biographical page which includes: name, photo, date and place of birth, passport/travel document number, issue date and expiration date."
CIT 0008 E: "Photocopy of all biographical pages in the minor's passport(s) or travel documents during five (5) year eligibility period."
(^ bold by me).
Is that correct that for a minor I do not need to photocopy all pages as I do for adults? Only biographical spread is enough for this item?
Well, you're taking it from the actual source, so yeah.
The rationale behind it : the child's eligibility isn't based here on the physical presence count. The whole passport content can serve as a proof (or at least an indicator) for the entries and exits from Canada for adults, but it would be superfluous for their kids.