Another made use of colour, depicting someone with green, blue and pink hair, with yellow eyes and a green collar.
A third appears to show the Princess sitting on an armchair with her legs crossed, while a fourth depicts either George or Louis with their eyes closed and appears to have been done in charcoal.
One drawing appears to depict the Princess sitting on an armchair and Prince George or Prince Louis with eyes shut. Photo / @princeandprincessofwales
It is hoped they will encourage others with children in their lives to follow suit by sitting down together and having a go at drawing each other.
The Princess is keen to promote the fact that spending time together, being creative and having fun helps to promote vital social and emotional skills that begin in early childhood and develop throughout life.
Louis, Charlotte and George may have inherited some artistic talent from their paternal grandfather, the King, who is a keen artist.
The monarch has long specialised in watercolours and has raised more than £2 million ($4.4m) for good causes from the sale of his landscapes.
This month, he agreed to loan a leading Polish cultural centre some of his watercolours after a plea from its gallery to exhibit his work.
The Princess is keen to promote the fact that spending time together, being creative and having fun helps to promote vital social and emotional skills that begin in early childhood. Photo / Getty Images
A series of his limited edition framed lithographs are on sale in the Highgrove online shop for between £2950 and £7500, with all proceeds donated to the King’s Foundation.
The King paints whenever his schedule allows, and usually takes his treasured sailcloth and leather painting bag with him on royal tours.
This month, the Princess unveiled a new initiative at the National Portrait Gallery as part of her early years project.
She travelled to the gallery by minibus with a group of children aged 4 and 5 before taking them on a storytelling trail and asking them to create a self-portrait.
The Bobeam Tree Trail, based on a magical tree with colourful leaves “grown” inside the gallery, is designed to boost children’s social and emotional skills. Drawing portraits is one of several home-based activities related to the trail.
It is not the first time that the royal children’s art has been released by Kensington Palace. In December 2022, Prince George’s painting of a reindeer in the snow attracted much praise.
In March 2021, the Prince and Princess shared homemade Mother’s Day cards made by their children not only for their mother but also their late grandmother, Diana, Princess of Wales. The couple explained that the family had a tradition of making cards to remember the late Princess.
George, then 7, had done a crayon drawing of a landscape featuring a tree, the sun, and birds flying in a blue sky.
Charlotte, then 5, coloured in a large heart on a pink background while Louis, 2 at the time, painted a heart on a green background, adorned with animal stickers.
In 2015, the Princess, who has a degree in history of art from the University of St Andrews and is a keen photographer, revealed that the 18-month-old Prince George was already showing a passion for art.