Prince Louis' latest obsession unveiled as Princess Kate makes admission during Melania outing

Together, the two women spent time with the children as they created artwork and spoke about their scouting experiences. At one table, youngsters pressed inked leaves onto paper and added their own illustrations.

While chatting with Chief Scout Dwayne Fields in the gardens of Frogmore House, the Princess, who is joint president of the Scouts, revealed that seven-year-old Louis is currently collecting conkers.

She said: "We keep finding conkers in cupboards, in his bed – conkers everywhere!"

Mr Fields smiled as she went on to explain that Louis even puts the conkers in his toy trucks and plays with them.

The visit also had a sweet touch, with oat and cranberry biscuits served to the children. The treats were baked in the royal kitchens using honey from Kate's own beehives at Anmer Hall in Norfolk.

The Princess, along with the King and Queen, is an enthusiastic beekeeper. Some of the Scouts also built bug hotels with Kate and the First Lady.

"I like bees, do you think bees will come into your hotel?" the Princess asked one young boy. She then added: "Where can they make their honey?" to which the boy replied: "Down here", pointing to the bottom of the cardboard structure.

The First Lady’s office confirmed that Mrs Trump gave every child a neckerchief as a gift, along with pots of White House honey. In return, Scout Leader Mr Field presented her with her own neckerchief to take home.

Kate played a key role in welcoming the president and his wife to the UK. She and Prince William were the first royals to greet them, meeting the couple as they stepped off Marine One at Windsor Castle.

Mr Trump was clearly charmed by the Princess, telling her: "You're so beautiful."

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The Prince and Princess then escorted the American visitors to Victoria Cottage, where they were welcomed by King Charles and Queen Camilla.

Kate also accompanied the Trumps on the carriage procession through Windsor before joining them for an official lunch.

Later, after the President and First Lady continued with their engagements, Kate and William met them again for the State Banquet.

The Princess was seated beside the President, who helped tuck in her chair as she settled for the evening.