Princes Charles, William, Harry
Princes William and Harry learned how to pick up trash with the help of their dad, Prince Charles. Pictured: Princes Charles, William, Harry attend a ceremony to mark the centenary of the Battle of Vimy Ridge on April 9, 2017 in Vimy France. Getty Images/Arthur Edwards-Pool

Prince Charles programmed his two sons, Prince William and Prince Harry to do a very normal thing.

The royal siblings shared their experience in BBC’s documentary for Prince Charles’ 70th birthday. Prince William said that their dad taught him and his younger brother to pick up trash.

“We were there with our spikes, stabbing the rubbish into black plastic bags. We both just thought, ‘Oh well this is perfectly normal, everyone must do it,” he said.

The network was given access to Prince Charles over the past year so that tons of information and new clips will be included in the documentary. One of the footage featured Prince William and Prince Harry watch a screening of a speech Prince Charles gave in 1970, warning of the dangers of plastic waste.

“That’s amazing. Look how young he is. I used to get taken the mickey out of at school for just picking up rubbish. I didn’t go out consciously looking for it. If you go for a walk somewhere and see something and it stands out, you pick it up. You realize I’ve literally done this before I am programmed to do it because my father did it and actually, we should all be doing it,” Prince Harry said.

Prince William added that his dad lives the way that he advocates.

Prince Charles will turn 70 on Nov. 14. He and Camilla Parker Bowles are currently in Africa for a nine-day tour. The Duke and Duchess of Cornwall will return to London on Nov. 8.

The future king was photographed joining in with traditional Ghanaian dancers who welcomed the royal couple’s arrival in Ghana on Friday. Pictured in a grey suit and sunglasses, Prince Charles showed off his dance moves to the massive crowd that waited for his arrival.

A video of Prince Charles participating in the traditional Ghanaian dance was shared online via royal correspondent Rebecca English’s Twitter account.