A MALE teenage student hugged and kissed a six-year-old boy left alone in a playground, Tsuen Wan Court heard. Magistrate Li Zong-er heard that the child was left unattended in the New Territories playground by his mother at about 11 am on March 20. The boy's mother was helping her husband in his work at a nearby shop when the incident occurred, prosecutor Alice Ip said. An hour later, Lau Wai-nam, 16, approached the victim and hugged him at the bottom of a slide. Lau then made the boy lie on the slide and pressed himself on top of him before kissing his cheeks and mouth several times. At this juncture, the boy's mother returned to the playground and saw Lau lying on top of her son on the slide. The boy immediately complained to his mother that Lau was pressing his abdomen against his own, the court was told. The police were then alerted. Under caution, Lau claimed that he wanted to have sex with the boy and that he felt excited when he saw him. Lau pleaded guilty to one count of indecent assault and was placed on probation for 18 months. He was ordered to undergo psychological treatment, and to study and reside as directed by the probation officer. Duty lawyer Munira Moosdeen said a probation report described Lau as a ''simple-minded and immature'' adolescent.