One possible reason why, in the past, many have considered children to be rather superficial in their processing of persuasive messages is that they are targeted with cues adults easily identify as persuasive tools (e.g. cartoon character endorsements, jingles, colorful images). However, these cues do not necessarily differ on a theoretical level from the cues that have effects among adults (such as visual imagery to convey product features, adult celebrity endorsements, humor, etcetera).
To learn more about our studies, please take a look at the slidedeck that was presented at the CTC2012 conference in Milan: