Duchess Catherine just revealed what makes her happiest - and she carries it with her everywhere she goes

The royal mum was in her element as she visited a school in London.

With kids as adorable as Prince George, Princess Charlotte and Prince Louis, who wouldn't be completely and utterly enamoured by them?
That's certainly the case for their doting mum Duchess Catherine, who shared a sweet revelation while visiting a school in north London on Tuesday, February 5th.
The royal was in her element as she chatted to Year 2 students where they discussed what makes them happy.
And just as we were picturing a giant block of chocolate, ice cream sundaes and even the feeling of that first dip in the ocean on a hot summers day, the duchess pulled out a picture from her wallet, revealing the faces of her precious children and husband, Prince William.
Too cute! Kate's revelation made our hearts melt. (Image: Getty)
"This is a photo of my family, these are my children," she told the children.
"My family makes me feel happy. And we like playing outside together and spending lots of time together as a family. And that makes me feel very happy."
The image, which was the same as the image released as their official Christmas portrait, shows the family dressed casually as they sit in front of their country home Anmer Hall.

Kate made a big impression as soon as she stepped out at Lavender Primary School, wearing a bright green woollen dress by Eponine London paired with a Mulberry clutch.
The royal styled her hair in its signature loose curls, and added an an edgy touch to her chic ensemble with black lace-up L.K.Bennett boots.
At the event, the mother-of-three also opened up about the importance of healthy eating telling the youngsters her daughter Princess Charlotte "loves olives" and making pasta sauce from scratch.
Chief executive of the Ivy Learning Trust, Matthew Kleiner-Mann, revealed: "She was telling us how much her children love cooking and how they cook for her. They made cheesy pasta the other day."
"One stirs the flour, one puts the milk and butter in, and they make salads and stuff. Food is important to her and she understands the links between mental health and physical exercise."
Duchess Catherine chatted to young children at a London school. (Image: Getty)
Queen of chic Kate nails the brief once again. (Image: Getty)
The visit was in respect of Children's Mental Health Week, with the Duchess, who is patron of Place2Be, showing her support by spending time with the youngsters at the school.
Place2Be provides in-school support and expert training to improve the well-being of pupils, teachers and families.
Kate is the perfect fit for the role, being a passionate advocate for early childhood learning and a strong believer in supporting children young to prevent them running into issues later in life.
And it's clear that Kate is a natural with kids - in January, the Duchess shared an adorable moment with a young girl when she stepped out with Prince William in Scotland.
In an adorable clip that went viral, a young girl is seen sharing a sweet moment with the 37-year-old Duchess as she strokes a lock of her hair. Kate takes it all in her stride, laughing and speaking to the young girl.
Watch the adorable moment in the player below: