That's not the only difference. Social media has a strong effect on the way kids talk to each other, treat each other, and most importantly: Bully each other. It's a vector for allowing petty childhood dramas go viral in dangerous ways that cause serious mental health issues up to and including suicide.

Advertising to kids is obviously a big part of the problem. But it's not the ONLY problem with social media – it's just one piece of a much bigger puzzle.