The Duchess brought back a vibrant Eponine London coat for a visit to Wales with Prince George, Princess Charlotte, and Prince William. 
Richard Palmer of The Express shared a video of the family arriving.
The Cambridges have brought Prince George and Princess Charlotte with them to Cardiff Castle. pic.twitter.com/vD5DVZRtJR
— Richard Palmer (@RoyalReporter) June 4, 2022
The engagement was part of the Platinum Jubilee weekend celebrating the Queen’s 70-year reign.
The royals did a walkabout. 
More from this Telegraph story.
It is the first time the two children have made an official visit to Wales. Prince George, eight, will one day be the Prince of Wales, and, as the Duchess told one concert organiser, lived in Anglesey when he was a small baby.
Royal follower Fifi shared photos on Twitter.
DAY 4 – The day I shook The Duchess of Cambridge’s hand and was very close to Prince William, Princess Charlotte and Prince George in Cardiff!!! ????????????????⚡️#TheDuchessofCambridge #PrinceWilliam #PlatinumJubilee #HM70#PlatinumPartyatthePalace pic.twitter.com/bLb69QbEZb
— Fifi ❤️ The Cambridges ???????????????????????? (@hellen3030) June 4, 2022
Another view. 
More from Simon Perry’s People story.
Their appearance in Wales underlines one of the main objects of the Jubilee weekend — to not only celebrate the Queen’s 70-year reign, but to also stress the future and the succession of the monarchy. In George and William, we have two future kings and two future Princes of Wales.
This BBC story also offers details of the walkabout.
Emma Thomas, from Cardiff, met the Royal quartet and said: “Prince George walked right up, shook my hand and said ‘I’m George’.
“Princess Charlotte was eyeing up the sparkling shoes of the lady who gave the flowers to Kate.”
We return to the People article.
The family also chatted with a group of local Scouts. “George and Charlotte asked how I got my badges,” Jack Lovatt, 12, tells PEOPLE. “And William asked George if he had done similar in scouts.”
The Duchess meets a youngster. 
Everyone met a goat named Shenkin the Fourth — the mascot of the 3rd battalion Royal Welsh regiment, per SimonPerry. 
One more return to the People story.
“They were very excited to meet him,” handler Sgt. Mark Jackson tells PEOPLE. “So when I explained that he also helps escort the Welsh rugby team out at the Principality Stadium, Prince George was even more excited by that. Both the children were mesmerized by Shenkin.”
Shenkin and Sgt. Jackson were among the battalion’s band, which was providing a festive musical backdrop as the royals left.
Another photo from the walkabout. 
More from The Telegraph’s story.
Anna Jones, 53, who had been in town to pick up her wedding dress, and new friend Sandra Harris, 74, engaged the children in a lively conversation about the Jubilee.
“Where’s your brother?” they wondered. “We were wondering where he was.”
Prince William told them the trip would have been a bit much for the four-year-old, gesturing to the floor where he jokingly predicted Louis might have laid down.
The ladies asked the children how their first Trooping carriage ride had been, telling Princess Charlotte they had seen how she “stopped Louis waving nearly too much” in top big-sister fashion.
“Is she bossy, George,” they joked, to laughter.
“At least you didn’t say it was mummy who was bossy,” Kate told him.
The Duchess meets a youngster.
The twosome looked a little bemused by the bouquets.
The Cambridges saw collages created by Welsh artist Nathan Wyburn.
Princess Charlotte takes a closer look. 
The artists posted a quick video on Twitter.
An absolute honour to meet and present my work to Their Royal Highness’ Prince William, Kate, George & Charlotte. @KensingtonRoyal
I created two collages of the royal couple and Her Majesty The Queen, using 1 image from each of her 70 year reign as monarch. Continued… pic.twitter.com/UPML3Fq7f9
— Nathan Wyburn Artist (@NathanWyburnArt) June 4, 2022
The royals also met performers and crew involved in tonight’s Platinum Jubilee Celebration Concert on the castle grounds. We return to The Telegraph’s article.
But as the family was invited into a small tech tent, helped on stage with the crew, George and Charlotte were immediately absorbed in the array of buttons before them.
A clearly thrilled George tried his hand at sliding the sound mixing buttons to vary which performers were loudest, listening through headphones as he was shown how to isolate one microphone.
At one point, the family laughed as someone – naming no names – caused a screech of feedback, with George jumping slightly and giggling.
Here is a quick video.
Here’s Prince George leading the way on the ones and twos. pic.twitter.com/kTP1u8VBEU
— Bronwen Weatherby (@BronWeatherby) June 4, 2022
Several royals tried their hand at conducting. 
A quick video.
WATCH Kate, Charlotte and George all getting into the musical swing of things in Cardiff, with mother and daughter taking turns to conduct an orchestra in rehearsals for the #PlatinumJubilee concert. Check out maestro Princess Charlotte here ???????? ???? pic.twitter.com/mxSbCogXuQ
— Roya Nikkhah (@RoyaNikkhah) June 4, 2022
Princess Charlotte gave it a go.
And had a giggle with her brother. 
Here is a little video.
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More from the BBC’s coverage.
Owain Wyn Evans said Princess Charlotte and Prince George had wanted to have a go on his drumkit, but they got a “bit too shy and so I did a little drum performance for them”.
“At the time I was dripping in glitter, but they said I actually needed more glitter – so I’m going to try and find some spray glitter for my fringe now,” he said.
Among the performers tonight is Welsh singer Bonnie Tyler, who was made an MBE in the Queen’s Birthday Honours. The Press Association’s Bronwen Weatherby shared a video.
George and Charlotte meeting legend Bonnie Tyler and drumming weatherman Owain Wyn Evans during their first ever official visit to Wales.
Watch @OwainWynEvans regale them on the drums ???????? pic.twitter.com/Ej7EygCBhG
— Bronwen Weatherby (@BronWeatherby) June 4, 2022
Prince William looked like he enjoyed the rehearsal as much as the children. 
The Duchess with her two oldest children. 
Kensington Palace posted a quick video from today’s engagement.
So lovely to meet the stars and team behind tonight’s concert. We had an extra special drum demonstration for George and Charlotte, saw a stunning performance from the Wales Youth Choir for Good and had a sneak peak at how the show will come together.
Have a great time! ???????????????????????????? pic.twitter.com/CDHJAdnt0A
— The Duke and Duchess of Cambridge (@KensingtonRoyal) June 4, 2022
Elsewhere in Jubilee weekend news, Princess Anne represented the Queen at the Epsom Derby. 
Richard Palmer of The Express reports that “Zara Tindall, among the royal party at Epsom, has been saying her granny will be watching the racing. “She’ll just be sat on the sofa watching the TV. She’ll be in her comfy clothes,” she says.”
While the Earl and Countess of Wessex visited Belfast. 
Now for our look at what Kate wore. 
She brought back the Wool Crepe Coat with Mandarin Collar by Eponine London. From the label’s 2018 A/W line, it features a front closure with self-covered buttons, buttons at the sleeve, scoop pockets at the hip, back waist belt, and the Mandarin collar. 
The piece was first worn in May of last year when the Hold Still photo book was launched. 
We saw a new handbag today, the Nano Montreal ($395) in navy leather by Demellier London.
The structured cross-body style measures roughly 7″ x 5″ x 3.5″ and has a removable/adjustable cross-body strap and tubular top handle. Thank you to Carly at Kate Middleton Style for this ID.
It looks like the Duchess wore a new pair of Gianvito Rossi 105 Pumps, with thanks to Gabi and Middleton Maven for this ID. 
The Duchess wore her Spells of Love Alia earrings (£79, about $100 at today’s exchange rates) by Welsh designer Hayley Jones.
As I was about to post, we learned the Duchess visited one of her patronages last night.
We received a very special surprise last night! Our Patron, HRH The Duchess of Cambridge, dropped in for a private visit to meet our patients, families and staff unable to join in the celebrations this weekend.???????????????? (1/2)#PlatinumJubilee #HM70 pic.twitter.com/YVArGGHVRb
— Evelina London (@EvelinaLondon) June 4, 2022
More from The Daily Mail’s story.
The Duchess of Cambridge made a surprise visit to Evelina London Children’s Hospital last night to surprise staff, patients and their families unable to join in the Jubilee celebrations this weekend.
Kate, 40, has been patron of the London hospital, which specialises in providing ‘life-changing’ treatment for children with rare and complex conditions, since 2018. She has been snapped visiting on multiple occasions since then, visiting patients and staff, and raising the profile of the hospital.
For her visit to the hospital, the Duchess *may* have been wearing her Cayla dress by LK Bennett; I’ve not had a good look at the photos yet. 
Here is one more photo of the children from the Cardiff visit, Prince George looking like his father’s mini-me.
And another of the Duchess. 
We’ll see you again for a post covering tonight’s Platinum Party at the Palace. 
VIDEOS:
The Royal Family Channel’s coverage of the Cardiff visit runs more than 5 minutes.
This is more than five minutes covering the Earl and Countess’s Belfast engagements.
And here is brief coverage of the Epsom Derby today.
Karen
Wednesday 8th of June 2022
I love the coat. Beautiful style and color. My one complaint is that it is too long. It needs a few inches off of the hem.
jp
Monday 6th of June 2022
I am also a fan of bracelet length sleeves (totally a real thing) they're neat and out of the way never flopping around one hand just to get grubby, sensible and not awkward at all. The rest is nice enough, but unremarkable I am never a fan of junk jewelry, but the shape is stylish. the coat itself is fine but the length is frumpy.
Zell
Monday 6th of June 2022
Some have complained about the length of the sleeves of Kate's beautiful coat dress, so I had to take another look, and now that I've noticed, it doesn't bother me in the least, which is why it didn't stand out before. This coat is more dress than coat to me, or at least as much a dress, as a coat. Given that, the sleeve length works just fine and the elegant tapering of the sleeves at the wrists is also beautiful, as well as the row of orange buttons at each sleeve. I stand convinced that this outfit is both elegant and dynamic, and the styling of the coat dress is perfection itself, including the sleeves. Just my take, of course! Kate glows in this color and it is one of the most beautiful outfits I've seen her in. A winner for sure!!!!
Stacey
Sunday 5th of June 2022
Meh. I am never a fan of the coat dresses Kate wears that look like the sleeves are too short. They aren't long enough to be full length and aren't short enough to be 3/4" so I feel they end up looking silly and as if she purchased something that simply doesn't fit correctly. I also think this coat is too heavy looking for a June event due to its length. On the bright side, I do love how the buckle on her clutch matches the earrings she chose. I loved seeing the Cambridge children out with their parents. They looked like they were having so much fun!
pca
Sunday 5th of June 2022
Good look for the occasion. I would have never thought to style the navy accessories with the coat, but they work very nicely. And the family all appears to be having such a great time!