Mandatory Credit: Photo by James D. Morgan/REX Shutterstock (3706250o) Catherine Duchess of Cambridge Prince William and Catherine Duchess of Cambridge at Manly Beach, Sydney, Australia - 18 Apr 2014 Prince William and Catherine Duchess of Cambridge at Manly Beach to watch children aged 15 and under taking part in the New South Wales Surf Life Saving Nippers' club. The children learn about surf safety and life-saving in between playing beach games and having races in the sea.