Since kids often go shopping with their parents, whether it be to the mall or grocery store, companies are specifically creating child-targeted packaging to entice children to ask their parents for the products.
Further, if a child were to see their favorite cereal on a non-cereal product, it would definitely spark curiosity to at least see what is being sold.
A simple yet effective way many brands successfully make child-targeted packaging is by including a cute animal somewhere on the box.
17 Examples of Child-Targeted Food Packaging
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Blabbermouth Biscuit Branding
Animated Bovine Branding
Pictorial Popsicle Packaging
Personified Peanut Branding
Anime Fast Food Packaging