In late May, Betsy Andersen’s 7-year-old son, Ezra, had a serious meltdown. He and his six-year-old sister Abby had been enjoying an online Zoom interaction with “Miss Eileen,” “Miss Savannah,” a couple of their colleagues, and a puppet. Betsy Andersen “I could see him trailing off and then he started crying,” says Andersen, who lives in Mundelein, Illinois. But before she swooped in, she heard Miss Eileen talking to him: “She was saying ‘Hey, I see you’re having some big emotions.” Speaking...