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She's athletic and artistic!

After spending some time with Great Britain's official field hockey team Thursday morning, Kate Middleton--accompanied by Prince Charles and his wife, Camilla, Duchess of Cornwall--tackled an arts and crafts project later that afternoon with members of the Prince's Foundation for the Children and the Arts.

This was Duchess Kate's first solo engagement with her father-in-law. The pair decided to pass the afternoon working with Charles' foundation at the Dulwich Picture Gallery in London because "[Charles and Kate] have a shared interest in art, art therapy and children," a Clarence House spokesman tells Us Weekly. (The foundation's purpose is to help disadvantaged children get involved in the arts.)

Once inside the gallery, Charles, Camilla, and Kate, 30, ironed images on to paper. Later, Charles stopped to paint with some of the children, when, according to an onlooker, he admitted, "I don't know what I'm doing!" Kate attempted a painting of her own, but reportedly told the kids she had paired up with, "Your [paintings] are so much better than mine!"

"There was genuine warmth between Catherine and her father-in-law," an eyewitness tells Us of the duo's big outing. "They were joking as they walked around meeting the children. Everyone was in great spirits."