Princes Louis and George, along with Princess Charlotte, have stolen the show as they join millions of volunteers around the country on the final day of coronation celebrations.
Coronation celebrations are concluding today, with the public invited to take part in the Big Help Out – billed as a volunteering event to mark the crowning of the King.
The Prince and Princess of Wales have been at a scout hut in Slough helping with renovations, with Princes Louis and George using wheelbarrows and drilling walls.
Prince William was seen driving a digger, while Princess Charlotte supervised efforts.
Many members of the Royal Family are attending various events, but the King and Queen will both stay out of the public eye today.
Buckingham Palace said: “While wholly supportive of the Big Help Out initiatives taking place right across Britain… (the King and Queen) will not be attending any events in person.
“These will instead be attended by other members of the royal family.”
Among the other visits, the Duke and Duchess of Gloucester have been at the Coptic Orthodox Church in London to help host a coronation street party, while the Duke and Duchess of Edinburgh were at a puppy class at a guide dog centre in Reading.
Prime Minister Rishi Sunak is in Hertfordshire, where he has been chopping vegetables and preparing food for elderly people in Rickmansworth.
Queen Camilla is patron of the Royal Voluntary Service and the Big Lunch Initiative, with the royals hoping the extra bank holiday today will encourage the public to volunteer.
There was a call-out for hundreds of thousands of volunteering roles, spanning 1,500 charities across the UK.
Those wanting to get involved can use an app to find opportunities nearby.
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Volunteers have already been in Green Park today, one of the Royal Parks in London, where they have been planting flowers and plants.
Bryony Cross, Royal Parks volunteers and programmes manager, told Sky News more than 180 volunteers signed up to take part in the flower planting
“It’s really important because we want to improve biodiversity in the parks,” she said.
Ms Cross said all volunteer spaces have been maxed out and there are more people attending than expected.
She added that “doing our part to get people to give to the environment” is something that is “close to the King’s heart”.
Residents of Albert Square will also be joining in the final day of festivities, with BBC soap EastEnders hosting a street party later this evening.
It is the final official day of coronation celebrations in the UK, after Saturday’s main event at Westminster Abbey, as well as Sunday’s street parties and star-studded concert.