In an article in the People today William is talking about his family Christmas. A typical general meaningless article. But he claims that his children's favourite board games are monopoly and risk. Charlotte and Louis seem far too young to enjoy playing these.
William received one question about board games, and he shared that Monopoly and Risk are favorites in his household with Kate Middleton and their three children: Prince George, 8, Princess Charlotte, 6, and Prince Louis, 3. However, it’s something that “usually everyone gets very cross about because they lose.”
people.com/royals/prince-william-favorite-christmas-traditions-board-games-with-kids/