Mary styled her boots with a patterned Valentino skirt and a modest high-necked sweater from Co.
The royal wore her hair in loose curls and accessorized her outfit with simple gold jewelry.
During the visit to the school Mary greeted fans and spent time undertaking activities with the children.
The royal was aiming to raise awareness for the Free of Bullying project which aims to prevent bullying in childcare facilities, pre-schools and primary schools and after school care.
Of course, Princess Mary is a natural with children and her work with them means a lot.
To see her greeting children on a recent trip to Ethiopia watch the video below.