Three-year-old Thomas Boffey saved his unconscious mother by dialing police—a skill the British boy learned from a YouTube cartoon. After his mom, 33-year-old Kayleigh Boffey, fell down the stairs and hit her head, Thomas remembered what he’d learned from Robocar Poli, a kids’ show featuring a police car, an ambulance, and a fire engine: In an emergency, call 999, the U.K. equivalent of 911. Kayleigh suffered knee, ankle, shoulder, and hip injuries but is now home recovering with Thomas. “He’s like a mini superhero,” she said. Megan Ragucci, 10, started losing her hair to alopecia universalis, an autoimmune condition with no known cure, when she was in first grade. People often stared; many assumed she had cancer. “I’m bald, not sick, so it really bothers me when people treat me…