The kids are running the castle now. All four of Queen Elizabeth and Prince Philip’s children were by the Queen’s side when she died Thursday at Balmoral Castle in Scotland. Three of them are likely to respond by taking on larger roles in the Royal Family. Charles The man known for more than 60 years as Prince Charles immediately became King Charles III upon his mother’s death. Born Nov. 14, 1948, Charles was named Prince of Wales at age 9 and held that title for longer than anyone in history. Charles married Diana Spencer in 1981, and they had two children together — William in 1982 and Harry…