Noted: Fortnite does, to be sure, involve firearms, and is recommended for ages 13 and up. But its graphics are free of blood and gore. And though adults may worry that shooting games cultivate aggression, C. Shawn Green, an associate professor of psychology at the University of Wisconsin-Madison who researches video games, notes that, “there’s really no evidence that playing a violent video game would take someone who has absolutely no violent tendencies and suddenly make them violent.”