The Duchess joined the children at the Club and Beaver Scouts to toast marshmallows around a fire pit.
Kate partook in all the activities including writing letters to send to care home residents.
She also opted for her signature sleek bouncy girls which fell over her shoulders.
The Duchess kept her makeup simple with strong eyebrows, peach blush and a pink lip.
She also went for minimal jewellery with a small gold chain necklace and matching hoop earrings as well as her engagement ring.
She made the visit as she was announced as joint president of Scouts, alongside the Queen’s cousin the Duke of Kent.
On becoming president, The Duchess said: “For many children and young people, The Scout Association plays a key role as they build relationships and develop the skills they need to succeed in later life.
“When I volunteered with the Scouts on Anglesey eight years ago, I was struck by the huge impact the organisation has on inspiring young people to support their communities and achieve their goals.
“I am delighted to be joining the Duke of Kent as joint president of the association and look forward to working with Scouts across the country as they strive to make a positive difference to our society.”
During the visit, Kate was presented with the Silver Wolf Award, the highest award made by The Scout Association and the Duke of Kent also holds it.
Kate has also been spotted in an olive green waistcoat from the brand.
Several years ago, on a visit to a campfire with children in Kent, she styled the green gilet with a thin v-neck jumper.
The gilet, which has deep pockets and an adjustable waistband, costs £415 and is from British brand Really Wild.