If you have ever met a child, there is a good chance that you have witnessed the floss, a dance move that little humans love with a passion. Princess Charlotte loves the floss, and her mother, Kate Middleton, has mastered the move.

In the new documentary Prince William: A Planet For Us All, the Duke of Cambridge speaks to schoolchildren during a visit to Liverpool. One student, Poppy, asked William: "What do you think of the Duke of Cambridge? His answer was: "No, Charlotte can floss. After this scene was filmed, Charlotte was five years old. Catherine can floss, but I cannot. It's like a really horrible movie to watch me floss." Attention!

In other Cambridge kids news: Over the weekend, the public heard Prince George, Princess Charlotte, and Prince Louis speak in a rare video Kate and William shared on Instagram (opens in new tab). Last week, Kate and William shared a photo (opens in new tab) of Attenborough visiting the Cambridges in the gardens of Kensington Palace.

George was the first to appear, solemnly asking Attenborough, "What animal do you think will become extinct next?" I asked. (His answer: hopefully not extinct if conservation efforts are adequately supported). Charlotte's question was a bit more subdued." I like spiders, do you like spiders too?" . Louis then asked, "What kind of animals do you like? Curious Attenborough's answer was, "I think I like monkeys best."