1 expert has answered
Kids already accept paywalls. Moshi Monsters, the App Store, Comixology - all of these (and many other services directed towards children) require payment on some kind of one-off or subscription based model. I think kids are just fine with it providing they aren't the ones actually doing the paying. And that goes for most of us.
I think the real issue here is will content providers learn (or perhaps re-learn) the connection between value and good quality content. The music industry, the film industry, the games industry are all highly profitable and the vast majority of people are happy in paying for quality.