People.com Royals Is This Kate Middleton's Best Photo Yet? Royal Mom Surprises Scouts by Climbing into Their Den "Wouldn't be a visit to Gilwell Park without a bit of den building," the Scouts said By Stephanie Petit Stephanie Petit Stephanie Petit is a Royals Writer/Reporter at PEOPLE. She has been with the brand since 2016 after graduating from The College of New Jersey and holding previous positions at Seventeen, CBS Radio and more. Follow the proud dog mom on Twitter at @stephpetit_ for the latest on Queen Elizabeth's corgis. People Editorial Guidelines and Simon Perry Published on March 28, 2019 08:49 AM Share Tweet Pin Email We independently research, test, review, and recommend the best products—learn more about our process. If you buy something through our links, we may earn a commission. Kate Middleton knows it isn’t a day with the Scouts unless you get a little dirty! During her visit to the Scouts’ headquarters on the outskirts of London on Thursday, the royal mom of three unexpectedly climbed into a den built against a tree alongside a little girl. The results? One of the best photos of Kate ever! “It’s very waterproof in here,” the 37-year-old royal said as she hunched down inside and children ran around the set-up. “Wouldn’t be a visit to Gilwell Park without a bit of den building,” the Scouts captioned the sweet image on Twitter, adding the hashtag #SkillsForLife. The den had just been built by the youngest Scouts, the Beavers. They had tested whether it was water proof – and the results were almost a complete success. Kate Middleton. Martyn Milner/The Scouts Association “Three trials were dry, one was wet! We are very proud that it was three quarters there,” says Frankii Newbury, the early year’s pilot project leader. “[Kate] got straight in there with one of our Beavers and checked it out. It was wonderful and the Scouts absolutely loved her. The highlight was the Duchess, smack bang in the middle of it all, getting in a den — braver woman than I am.” Kate Middleton. Eddie Mulholland - WPA Pool/Getty Images Kate, who was a Brownie as a young girl alongside her sister Pippa Middleton, spent time with parents, leaders and children taking part in trials for a new pilot program for the youngest Scouts. The pilot has been exploring the potential of providing Scouting to children between the ages of 4 and 6 as research has shown that the first five years of a child’s life are more important to the development, and future health and happiness, of a child than any other single moment in their lifetime. Kate Middleton. Eddie Mulholland - WPA Pool/Getty Images Kate Middleton. Eddie Mulholland - WPA Pool/Getty Images Kate, a patron of the Scouts since 2012, joined in on a number of sessions with the kids, including activities to improve communication and teamwork such as boat building and balloon rocket assembling. Can’t get enough of PEOPLE’s Royals coverage? Sign up for our newsletter to get the latest updates on Kate Middleton, Meghan Markle and more! Gilwell Park, which lies close to Epping Forest, is recognized internationally as the home of Scouting. Located on the edge of Epping Forest, it is a Scout campsite, training and adventure center, and home to the organization’s U.K. headquarters. Before she left, Kate was set to plant an oak sapling to help mark the 100th anniversary. Kate Middleton. Joe Giddens/PA Images via Getty Images For the outing, Kate dressed down in a red mockneck sweater (still available in a variety of colors at J. Crew!), black pants and boots. She completed the look with a khaki jacket and a red, white and blue U.K. Scouting scarf – which was tied with a friendship knot! Kate Middleton. Anthony Harvey/REX/Shutterstock Kate Middleton. Eamonn M. McCormack/Getty Images All About Kate Middleton’s Latest Outfits — and How You Can Get the Look Yourself Kate took inspiration from the outdoors while helping to design a woodland-themed garden for children and their families that will debut at the annual Chelsea Flower Show in May. The garden was designed to encourage children to stay active and engaged and features stepping stones, hollow logs (to test balance and coordination), a waterfall and a stream that kids will be able to play in. Kate Middleton’s garden design. Richard Carman/Davies White Ltd/Getty Images The project to create the woodland-themed garden was a “passion” for the royal, who has taken on a very hands-on role to add inspiration and practical ideas for the garden. “To us, this is very much about childhood memories. We all spoke about our childhood memories, being outdoors and exploring nature. She was very open and has been hugely collaborative,” Kate’s collaborator Adam White previously told reporters.