Princess Charlotte and mum Catherine also put on an adorable display together, with Charlotte cuddling close to her mother during a quieter moment, and later playing with her hair in admiration.
George, 4 and Princess Charlotte, 3 - to watch dad Prince William play polo at the Beaufort Polo Club in a match to raise funds for charity.
Princess Eugenie, along with her sister Princess Beatrice, however, are not considered to be working royals despite being princesses of the blood, as evidenced by the fact that they are not featured on the royal family's royal.uk website.
Over the course of the day, the little royals could be seen playing with a huge slinky, a miniature golf set, arts and crafts and the controversial toy gun. At the grandiose event, the royal tots joined the rest of their family on the Buckingham Palace balcony, but they caused a bit of a scene when Savannah covered George's mouth to stop him from singing. My American side here, biased maybe because of everyday #gunviolence in United States of America, but my British side agrees.
But pictures from the day depicting George brandishing a toy gun cast a shadow on an otherwise happy day.
Kate was just like any other mom as she cuddled her kids on the sidelines and then hurried after them as they ran off to play. This looks far too real.(And I LOVE Prince George, don't get me wrong!)'.
Many took to social media to criticize the royals' toy choice given the increase of gun violence.
Many balked at the toys, given Britain's knife- and gun-related violence, which is "rising at an accelerating pace", according to the U.K. Guardian.
On the day, the Princess also treated her followers to a snap of her father, Prince Andrew, standing in a hall in the palace.