More than 10 schools from across Hertsmere took part in the council's tenth annual youth conference.
The pupils, all aged between 10 and 12, attended the youth conference in Borehamwood on March 14 and took part in an interactive quiz called Who's Right for the Job?' which explored citizenship and involvement in democracy.
During the afternoon, participants debated the age of criminal responsibility, which is currently 10 years old, and whether or not it should be changed to 16. The young people then had an opportunity to vote on whether to change the age during a mock referendum.
Hertsmere Borough Councillor Brenda Batten said: "This was another highly successful youth conference and it was great to see so many young people engaged in local democracy.
"The youth conference aims to show how the democratic decision-making process works, the role the council plays and how young people can contribute to improving their local community.
"I was really impressed by the young people's thoughtful and comprehensive debates, they were enthused, engaged and involved throughout the whole day. I think we have some budding politicians."
Schools who took part included Yavneh College, Kenilworth Primary School, Parkside Community Primary School, Hertswood Academy and Monksmead School in Borehamwood.
Pupils from Bushey Meads School and Bushey Heath Primary School, in Bushey, Dame Alice Owen's School and Cranbourne Primary School, in Potters Bar.