TriggerPhoto/iStockphoto/Getty Images Carmen Peterson’s son Ethan is a big fan of Elmo and Mickey Mouse Clubhouse. And although Ethan is nonverbal, he loves to sing along in his own way. “He’s a really fun-loving 8-year-old. He doesn’t speak, but he gets his point across,” Peterson says. Ethan has a rare genetic disorder — Syngap1 — […]