What if kids were dentists? This ad for Colgate finds out. Quite silly as you'd expect it to be.
It's also very similar in execution to AT&T's It's not that complicated campaign.
I suspect the reason is twofold. For one thing, "Parents with kids" is becoming as hot a demographic as 18-24, since you know, parents with kids spend money on necessary items on a daily basis. And secondly it's because a lot of people in advertising now have kids at this age and are discovering what parents who don't work 80 hours a week already know about kids: That they're cute, fun and idiosyncratic.
I know mine is. Except she's way smarter and cuter and funnier. And that's an unbiased opinion.