The three youngsters, Eliza, six, and twins Gus and Louis, five, were clearly in high spirits during their day out in Aberdeenshire – an outing made all the more special by the arrival of Charles and Camilla.
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Prince Charles receives a hug from one of the Duchess of Cornwall's grandsons
The prince, dressed in a traditional kilt and sporran, received a big hug from one of the twins which he fondly returned, a big smile across his face.
Meanwhile, little Eliza – who acted as a bridesmaid at the Duke and Duchess of Cambridge’s 2011 wedding - seemed intrigued by the royal’s sporran, and stepped up for a closer look to the amusement of those around her.
Little Eliza seemed intrigued by Prince Charles' sporran
Prince Charles and Camilla are currently holidaying in Scotland, at their Birkhill home, located on the Balmoral estate.
It was their first visit to the Games, but they quickly got into the spirit of things, watching events include hammer throwing, and even toasting the event with a dram of whisky.
Prince Charles and the Duchess of Cornwall were seen enjoying a dram of whisky
The couple – known as the Duke and Duchess of Rothesay while in Scotland - happily chatted with locals at the event, with Charles giving a big smile and a wave to one little boy particularly excited to see the royal guests.
Charles became a grandfather for the first time last July when William and Kate welcomed Prince George, and it is a role he has thrived in.
Prince Charles waves to one little boy who was particularly excited to see the royals
His delight at George’s arrival was evident in the statement he issued immediately following the birth.
“Both my wife and I are overjoyed at the arrival of my first grandchild,” said Charles, who was among the first to arrive at the hospital to see the newborn baby boy.
"It is an incredibly special moment for William and Catherine and we are so thrilled for them on the birth of their baby boy.
"Grandparenthood is a unique moment in anyone's life, as countless kind people have told me in recent months, so I am enormously proud and happy to be a grandfather for the first time and we are eagerly looking forward to seeing the baby in the near future."