We got a rare glimpse of Prince George and Princess Charlotte at play in June when Kate took them to watch William play in the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club. The little heirs ran in the grass and goofed around with cousins and friends, while Kate showed her more casual side in a simple dress. Missing from the laid-back event was the family's newest addition, Prince Louis, who was less than 2 months old.