The Koestler Trust is a group of people who work together to help prisoners, young people in custody, and people in other kinds of institutions express themselves through art. They believe that creating art can help people with difficult experiences feel better, learn new skills, and communicate their feelings to others. The Trust encourages people to be creative by offering them materials, equipment, and workshops where they can learn new techniques and make new friends. They also organise competitions where people can show off their artwork and win prizes. The Koestler Trust helps to make sure that people in tough situations have opportunities to be creative and feel good about what they make.