One day, during her usual chat with her eight-year-old son about school, Tracey Cooney got an answer she didn't expect. There was nobody to play with. Everyone was playing in their own little groups," he confided. She was surprised because he was usually outgoing and confident. Cooney felt a little upset, but remembered something she had seen on social media and wondered if it could help children in his situation. It's called a Buddy Bench. The idea is simple - if a child feels lonely, they can go to the bench as a signal that they need someone to play with. Another child will see them, go and talk to them and include them in their games. So Cooney asked other parents and the head teacher at Castlemartyr National School in Cork, Ireland, whether they would be interested in getting one - their answer was, "Yes." "We use the bench as a reminder for children of things like communication, mutual support and opening up about feelings," says Judith Ashton, a psychotherapist and co-founder of ... Buddy Bench Ireland. Apart from reducing social isolation and improving mental wellbeing, the hope is that the benches can tackle another problem: bullying. But do children actually use the bench? "They don't see it as stigmatised," says Sinead McGilloway ... who led a study of 117 pupils at three schools which have benches. Forty per cent of the children she questioned said they had used the bench, and 90% said if they saw someone else sitting on it they would talk to them.