Along with Princess Charlotte, the Duchess of Cambridge and other members of the family, the children played outside while the Duke of Cambridge took part in the Maserati Royal Charity Polo Trophy match.
While Prince William trotted about on a horse and smacked a ball with a mallet, Kate, Prince George and Princess Charlotte all relaxed on the grass.
However, images of young George wielding a toy gun (and a toy knife) spoiled the mood online.
While Prince George and Princess Charlotte grabbed all the attention during last weekend's Trooping the Colour, Prince Louis was nowhere to be seen (most likely sleeping soundly somewhere back at Kensington Palace). "THAT is #girlpower", one person wrote. I really don't get toy guns - why play with things you should never have to use. My American side here, biased maybe b/c of everyday #gunviolence in U.S., but my British side agrees.
Max Mumby Indigo via Getty Images Prince William gives his son a disapproving look
"In this context - a public event that invites the public to participate - it's risky to allow a toy gun, because many people look to the family for compassion and leadership", Gilboa tells Yahoo Lifestyle. "This looks far too real", one Twitter user said.
Another person commented that while "Prince George might be our future King", Savannah "decides she's the boss on the balcony".
On a visit to Finland last November, William met Father Christmas in Helsinki and was on a mission to present Santa Claus with a Christmas list from George, which featured one request - a toy police vehicle.
Okay, okay, slight exaggeration but it is refreshing to see the royal family having a day out just like anyone else.
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