She wrote: "It looked like a fantastic day!"
The duchess has made the issue of the "future health and happiness" central to her public activities and hopes the results of the survey spark a conversation on early childhood and guide the focus of her work.
The outing was far more than just a way for Kate to show off her latest fashion, however.
Kate's love for animals has been well known.
"So down to earth".
Prince William and Kate To Visit Bushfire-Ravaged Towns In Tour Of Australia
Tominey shared that, like Middleton, other members of the royal family will be expected to take on bigger roles following "Megxit", including Queen Elizabeth II's daughter Princess Anne, as well as Sophie, Countess of Wessex.
In the interview, he revealed teabags were not common at the palace, and instead the Queen preferred loose leaf tea, brewed in a teapot.
"This could be very useful blueprint - not for George because he is going to be King - but for Charlotte and Louis, for the royals who are not in direct succession to the Crown", she said. The Duchess of Cambridge also interacted with children as well as helped in bottle-feeding a lamb along with a young girl.
"It is also a myth that members of Royalty use their pinky when drinking, I have never seen that happen once".
Kate Middleton has owned the boots for at least 16 years and was first spotted in them at the Blenheim Palace Game Fair in August 2004, pictured, shortly after news of her relationship with Prince William first emerged.
The Duchess of Sussex is said to prefer herbal infusions over English breakfast tea.
Last month, Kate launched a landmark national survey on the early years development of children.