Prince Harry rang in his 32nd birthday on Queen Elizabeth's secluded royal estate, Balmoral, in Scotland over the weekend.

The outdoorsman was joined by close family and friends, including cousin Princess Eugenie and her boyfriend Jack Brooksbank. Prime Minister Theresa May was also there for her first official weekend visit to Balmoral – the prime minister traditionally spends a weekend with the Queen in September.

The royal party took part in a traditional hunting weekend in the gorgeous Scottish highlands.

The birthday boy is back to work this week with a groundbreaking visit with the Diana Award – the charity set up in the name of his late mother, Princess Diana – in Aberdeen on Tuesday.

Since 1999, the Diana Award has recognized more than 45,000 ordinary young people who have made an extraordinary difference to their community.

During his visit, Harry will encourage new mentors to come forward to help young people – and he's the perfect person to do so, says Tessy Ojo, chief executive of the charity.

"He is like the boy everybody knows, in some sense," Ojo tells PEOPLE. "Everyone identifies with him, they can identify with various aspects of his life."

Harry will meet with 60 young Scots who are being trained to be mentors in schools. He will also see three community-based social action projects, including how sports are used to help aid social development.

It's the first time Harry has taken part in an event with the Diana Award on his own. His brother, Prince William, has done several events highlighting anti-bullying efforts.

"It's important that young people have good role models – and it is best if they are from their age group or just a little older," Ojo says.

"I want to reach out to 20-30 year olds – these people who have just got into employment and are not too far off being 14. They remember what it was like," she adds. "With Harry just in his 30s, he is a great role model to inspire that generation."

During his visit on Tuesday, Harry may be asked who his mentor as when he was a teen.

When Diana's brother, Charles Spencer, spoke to the charity in July, he said his older sister had been an early mentor and peer support for him.

And next year, during the 20th anniversary of Diana's death, her legacy will be honored even further.

"The Diana Award is very much celebrating Diana's legacy," Ojo says. "It is fantastic that as we get closer to the 20th year, both princes are showing publicly what that legacy looks like. It is about her work and the young people – the legacy lives on through the young people.

"It is great to see both princes play hugely active and public role with the Diana Award and pushing the causes we espouse."