'We'll be here all day!' Prince William teases Kate Middleton as she struggles to bounce a ping-pong ball into a cup during visit to Scotland

 The Prince of Wales, 41, was the first to try out the task and succeeded immediately, with his wife quipping: 'You've done that before.' But when Kate, also 41, dressed in a checked Burberry jacket, tried her hand at the game, it proved a little more difficult for the royal. After missing the cup a couple of times, her husband joked: 'We'll be here all day!'. When the ball finally landed in the holder, Kate told the children watching: 'Finally.' William and Kate - known as the Duke and Duchess of Rothesay when in Scotland - visited DAY1, a Highland-based charity in Inverness, which provides mentoring, training, personal development and employability services to vulnerable young people.