The excitement hasn't died down yet over the cuteness of the four-year-old Prince Louis Arthur Charles, Prince of Cambridge, who stole our hearts at last weekend's Platinum Jubilee. He appeared in a carriage procession and then on the balcony of Buckingham Palace for "Trooping the Colour" (that look! The waving and frolicking! The sailor outfit!) ), "Platinum Jubilee Pageant" to provide sideline entertainment, and finally on the balcony with his family.

"He's a cheeky monkey, a typical third child," a person familiar with the royal family told PEOPLE. 'It's nice that the whole world got to see him having fun.'

Perhaps most important to us, as well as the world, is that the queen was amused by the antics of her great-grandson, who was standing next to her on the balcony Thursday. Grandfather Prince Charles shared a special moment with Louis at Sunday's pageant, holding him on his lap. Kate Middleton played mommy-goal with her younger son all day (seriously, can she teach him a lesson in patience?), and her sister Princess Charlotte was not with her brother on Thursday or Sunday.

And the Cambridges had an "incredible time, all of us, especially Louis..." on the Jubilee's social media.

The Jubilee was a fitting celebration to honor Her Majesty's historic 70-year reign, but by including Louis, his siblings, and other royal children, it also showed that the monarchy would continue long after Her Majesty's reign was over (which may be many, many years from now) It was also to show that the monarchy would continue long after Her Majesty's reign was over (which may be many, many years from now). [Sally Bedell Smith, royal family expert and author of Queen Elizabeth: The Life of a Modern Monarch (opens in new tab), tells PEOPLE, "The Queen's reign is a celebration of the past and an anticipation of a new era. 'There was an atmosphere that celebrated the past and foreshadowed a new era.'

May there be many such moments in the new era.