She sported a pair of oversized shades and tried to do a somersault, which left a smile on Middleton's face.
Prince George of Cambridge, Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club, June 10, 2018, in Gloucester, England. George and Charlotte have had a banner year.
The baby prince was also absent from the Royal Family's balcony appearance on Saturday afternoon.
However, images of young George wielding a toy gun (and a toy knife) spoiled the mood online.
Kate wore a stunning blue dress from Zara, costing only £39.99.
While Middleton opted for a casual look, she added some height to her frame with heels, choosing beige espadrille wedges that appeared to be by Russell & Bromley.
But there's one element of the pictures that people aren't all that over-enthusiastic about: Prince George playing with a toy gun.
Charlotte, 3, wearing a pink sundress and adorable sunnies, was spotted running around barefoot on the field with her brother and practising her tumbles. As Prince George began talking, Savannah nonchalantly placed her hand over his mouth to silence him and looked directly into the camera as she did so.
But don't think Charlotte was alone in all of the shenanigans. Several users dismissed the criticism, arguing they themselves had toy guns as kids, and that such play does not encourage violence. I really don't get toy guns - why play with things you should never have to use Kate alone shouldn't be blamed about this as we don't know who owns the toys, but someone should have said that this is NOT OK'. The pushing incident came on the heels of Savannah publicly teasing George in a different way just one day earlier.