Prince William is said to have made a sharp remark to Queen Camilla during the VE Day celebrations, and reports claim she responded by admitting she needs to “try harder.”

It’s rare to see the entire royal family—young and old—come together on the Buckingham Palace balcony. But on 5 May, to mark 80 years since VE Day, when Germany surrendered in World War II, the royals reunited to watch the traditional flypast.

The Prince and Princess of Wales brought along all three of their children, who were seen playing a small game to stay entertained.

Kate was seen encouraging George, Charlotte, and Louis to keep their “eyes on the sky” as they watched the colorful smoke trails left by the planes.

Now, a lip reader has reportedly uncovered exactly what was said during this latest balcony moment.

According to Hello! Magazine, lip reader Nicola Hickling said that the family seemed to be trying to keep the kids interested during the event.

Talking to her seven-year-old son, Prince Louis, Kate reportedly said: “When the flypast comes, you will see it smoke blue, white and red.”

As he watched the RAF planes fly overhead, he commented: “They have lots of tanks.”