Happy families: new photos of the Duke and Duchess of Cambridge and kids at the Chelsea Flower Show

The royals took their three children for a sneak peek of the Duchess' garden

The Duchess of Cambridge has created a garden of her own for this year's RHS Chelsea Flower Show, and on Sunday, May 19, her three children were among the first to enjoy the lush, green space.

Newly released photos show Prince William and his wife playing with their children in the garden, and one even shows 1-year-old Prince Louis's first steps on camera.

Click through the gallery above to see all of the adorable new photos. 

Prince Louis takes his first steps on camera. AP

The photos, taken by Matt Porteous, also show Prince George, 5, and Princess Charlotte, 4, sitting on a bridge above a stream. Charlotte and Louis can also be seen enjoying the garden's swing.

Chelsea Flower Show's RHS Back to Nature Garden has been designed by the duchess along with landscape architects Andree Davies and Adam White, of Davies White Landscape Architects. According to Kensington Palace, it is "a woodland setting for families and communities to come together and connect with nature".

“I really feel that nature and being interactive outdoors has huge benefits on our physical and mental well-being, particularly for young children," the Duchess of Cambridge told the BBC's Monty Don. "I really hope that this woodland that we have created really inspires families, kids and communities to get outside, enjoy nature and the outdoors, and spend quality time together."

The palace said: "Her Royal Highness is a strong advocate for the proven benefits the outdoors has on physical and mental health, and the positive impact that nature and the environment can have on childhood development in particular."

The Duchess of Cambridge and her son Prince Louis play in the garden before the RHS Chelsea Flower Show. AP

And the three young royals have played a part in the creation of the garden. The family is known for their love of the outdoors, and the children have been gathering items for the garden.

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"Over the past months, Prince George, Princess Charlotte and Prince Louis have helped the Duchess gather moss, leaves and twigs to help decorate RHS Back to Nature Garden," the family's Instagram revealed. "Hazel sticks collected by the family were also used to make the garden’s den."

Earlier in the week, images of the Duchess of Cambridge at work in the garden were shared.

"In recent years I have focused much of my work on the early years, and how instrumental they are for outcomes later in life," the mother-of-three said about the importance of time outdoors.

"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."

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What is in the RHS Back to Nature garden?

1. A high platform tree house, inspired by a bird or animal nest, that provides a place to retreat and look out through the trees. The tree house is made from chestnut, with hazel, stag horn oak and larch nest cladding.
2. A swing seat that hangs below the garden's tree house, which "encourages creative play and discovery for all generations".
3. There are plenty of crafts to be found. The garden will be filled with edibles, plants for craft activities, forest scents and a diverse range of plants, shrubs and trees of different heights and textures.