Britain's Prince William soothes his children with water.
The 33-year-old royal - the grandson of Queen Elizabeth and Prince Philip - has found the best way to settle his son Prince George, two, and 12-month-old daughter Princess Charlotte when they're distressed is by running a tap.
According to Us magazine, the prince said that although Charlotte isn't much of a crier, the sound of water running would always comfort his eldest child when he's sad.
The duke made the revelation at the launch of his charity campaign Heads Together, which he, his wife Duchess Catherine and brother Prince Harry unveiled at the Queen Elizabeth Olympic Park in London on Monday (16.05.16).
During the event, the trio - who are on a mission to stamp out stigma attached to mental health - were asked to write down something that makes them happy.
Harry, 31, said "making people smile" usually cheers him up, Catherine, 34, finds a "walk" puts her in a good mood, while William wrote his "children" are always making him proud.
Meanwhile, William regularly gushes about his little ones, whom he has with Catherine, and about how fatherhood has changed his prospective on life.
He said last year: "I'm a lot more emotional than I used to be, weirdly. I never used to get too wound up or worried about things. But now the smallest little things, you well up a little more, you get affected by the sort of things that happen around the world or whatever a lot more, I think, as a father."
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