Kate Middleton shares sweet photos of Prince George, Princess Charlotte and Prince Louis baking cupcakes with her

The Cambridge kids had a very busy Platinum Jubilee weekend.

To celebrate their great-grandmother, Queen Elizabeth, they made their Trooping the Colour carriage debut, stole the show on the Buckingham Palace balcony and sang up a storm at the Platinum Party at the Palace.

Behind closed doors, they were also busy baking cakes for a Cardiff street party.

Taking to social media, Kate Middleton shared a sweet video montage of Prince George, eight, Princess Charlotte, seven, and Prince Louis, four, making the treats in their kitchen ahead of the family's visit to the Welsh capital.

"Baking cakes for the local community in Cardiff to enjoy at a Platinum Jubilee street party taking place today! We hope you like them!" she wrote on Instagram.

In the photos, the three kids can be seen standing on chairs to get a better view of the batter in a stand mixer.

In one, Charlotte pours flour into a bowl as her older brother, George, looks on, and Louis is in the background, focused on the stand mixer.

In other photos, Charlotte holds an egg over a bowl, and Louis is extremely focused on sifting flour.

The Cambridge kitchen was decorated for the festive baking occasion, featuring Union Jack bunting in the background of all the photos and blue hydrangeas near the stovetop.

The cupcake liners, too, featured the Union Jack flag, and the sprinkles appeared to be all red, white, and blue.