Luckily for the little royals, after behaving well on the balcony of Buckingham Palace, they were able to enjoy a fun day out at the with their mum Kate and let off some steam.
George, who's known to have an interest in police, was also pictured playing with what looked like a toy knife and handcuffs.
Prince William previously told Radio 1 he and Kate sometimes sit down with their children to watch TV as a family.
After the pictures emerged, several people took to Twitter to voice their outrage and suggest that the royal family should have been more mindful about the toys they give Prince George and Princess Charlotte. "THAT is #girlpower", one person wrote.
She was also seen relaxing in Kate's lap and climbing up a bank with her mother.
Another said: "This isn't okay anymore..." My American side here, biased maybe b/c of everyday gunviolence in United States of America, but my British side agrees.
But when Prince George tried to join in, he was quickly silenced by Savannah, who put her hand over the third in line to the throne's mouth.
The choice to allow children to play with toy guns is "intensely personal", says Deborah Gilboa, MD, a parenting and youth development expert.
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 auto.
However, images of young George wielding a toy gun (and a toy knife) spoiled the mood online. The midi length and waist tie further flatter the frame, making this an easy choice for a Sunday family outing.