Kate Middleton broke the Chelsea Flower Show’s rule when she took Princess Charlotte and Prince Louis to explore the garden she helped design. According to the Royal Horticultural Society (RHS), children under the age of 5 are not allowed inside. Charlotte is only 4, while Louis is only 1.

“We regret that we cannot allow under 5s, prams, pushchairs or babes in arms at Chelsea and over 5s pay full price,” the Chelsea Flower Show stated in their website.

Royal fans and organizations, however, urge RHS to rethink its policy and allow children below 5 to explore the most famous flower and landscape garden show in the U.K. The five-day annual Chelsea Garden Show, which has been held in Chelsea, London, since 1912, attracts visitors from around the world, including the British royal family.

The Duchess of Cambridge, in a lovely maxi floral dress by British label Erdem, brought husband Prince William and their three lovely children to the garden show ahead of its opening day on May 20. Of the three royal children, only Prince George, the eldest, has passed the age requirement as he is already 5 years old.

“Lovely pictures of infant royals at Chelsea Flower Show — I love Chelsea but you wouldn’t see any other under-fives there because they’re banned. Wish the RHS would change this policy,” tweeted political commentator Jane Merrick.

“And children over the age of five are charged full adult price. The RHS should make Chelsea more child-friendly to all kids, not just those in line to the throne,” she added.

The said “lovely pictures of infant royals” are six adorable and rare photos of the kids released by Kensington Palace. The photos were all taken by photographer Matt Porteous, who also snapped official photos of Prince Louis’ christening, as well as George’s third and fifth birthdays.

Kate designed the “royal garden” with the help of landscape architects Andree Davis and Adam White of Davies White Landscape Architects and is inspired by her childhood memories. Three days before the garden show, she even shared a few “teaser photos” of the garden.

“In recent years I have focused much of my work on the early years, and how instrumental they are for outcomes later in life,” Kate said in her photo caption. “I believe that spending time outdoors when we are young can play a role in laying the foundations for children to become happy, healthy adults.”

Her garden’s features include a tree house, a rope swing, edible plants and a campfire. Her children even pitched in with the design of the campfire, with George, Charlotte and Louis adding moss, twigs and leaves to its surroundings.

Princess Charlotte, Prince George and Kate Middleton Catherine, Duchess of Cambridge; Prince George of Cambridge; and Princess Charlotte of Cambridge attend the Maserati Royal Charity Polo Trophy at Beaufort Park on June 10, 2018, in Gloucester, England. Samir Hussein/WireImage/Getty Image