Kate, the Duchess of Cambridge and Prince William have taken a leading role in helping the Queen by stepping up and adding extra duties to their already busy schedule. But despite the pressure they face, the Duke and Duchess of Cambridge had ensured to pay special attention to their younger fans. According to royal expert Richard Kay, the special trait is a lesson Prince William learned from his mother Princess Diana, and later passed on to his own wife.

       He said: "There is an authenticity in how they deal with small children.

       "I hate bringing back the lessons of the past, but it's clearly something that William will particularly remember from his mother.

       "The way that Diana got down to a child's level so that she could look eye to eye to children."

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       He added: "Whereas royals up to that point would put their hand down and look down at children and children would have to look up.

       "And that's something that Kate and William have started to do.

       "They will make a point of getting down into the child's eye level. And it's all that to do with that eye contact.

       "They've learned that it means so much more to a child if an adult gets down to their own level.

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       "Kate is very interested in the early years of children and their development and how if things go wrong within the first five years of a child's life, it can lead to problems later on, such as addiction and family breakdown."

       The Duke and Duchess have also learnt other tricks from William's late mother, including what they teach their children.

       According to a source, the royal children have been taught to write thank-you notes to people that have helped them.

       A source told to My London that the Duke and Duchess of Cambridge, "have developed this brilliant knack of letting as much as they can seem spontaneous and that’s how the children see it."

       "Table manners, thank you letters, little courtesies are being drilled into the children so they become automatic."

       Manners are an important part of the children's upbringing, as when they get older they will be thrust into the spotlight.

       The young royals attend Thomas's Battersea school in southwest London.