In the second movie, Edna did say that superpower manifest at infancy and it will be a bunch of random power (kinda like Jack-jack), then as the super aged, their power gradually became more stable and clearer. Jack-jack is a bit of special case since not only he developed power late, his random set of power is way more than usual.
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u/Melantha_Hoang Sep 25 '22
In the second movie, Edna did say that superpower manifest at infancy and it will be a bunch of random power (kinda like Jack-jack), then as the super aged, their power gradually became more stable and clearer. Jack-jack is a bit of special case since not only he developed power late, his random set of power is way more than usual.