A jobless man accused of punishing a three-year-old by forcing him to kneel on a stool placed on top of a mahjong table went on trial yesterday for child cruelty. The Court of First Instance heard that the boy fell to the floor at one stage and was put back on the stool. Tin Kam-ming, 25, has denied ill-treating or neglecting Lau Man-tik at the boy's home in Sau Mau Ping Estate on May 8 last year. Prosecutor Jeffrey Fenton said Tin's actions had caused the boy unnecessary suffering. He said that on the day of the incident, Tin, who was a friend of the boy's mother, Wong Fun-yi, was in charge of the boy and had escorted him home from kindergarten. But after eating dinner at 8pm, the child had misbehaved when asked to recite his homework in English. 'Like a typical child he grumbled and was naughty,' Mr Fenton said. He said Tin then stacked a stool on top of a mahjong table and put the crying three-year-old on top of it for about 20 minutes. At one stage the child fell to the floor. '[Tin] then picked him up and put him back on the stool,' he said. There was no mention of injuries. Mr Fenton asked the jury to think about the mental pain and anguish the three-year-old would have experienced. He said that on the charge of cruelty towards a child, it was not necessary to prove the actions resulted in injury. Nor was it necessary to consider whether Tin's actions were necessary to punish a naughty child, Mr Fenton said. 'The purpose of doing it is irrelevant,' he said. 'If that act itself is cruel, that's sufficient [to find him guilty].' The trial continues today before Mr Justice Louis Tong Po-sun.