The heartbroken parents of two children killed when they were hit by a car in Sydney's south-west yesterday have spoken of their shock, saying they forgive driver.The distraught parents of five-year-old Katherine and Harry, one, fought through tears on Thursday morning speaking of the crash near their Cabramatta home."I can't describe it, last night I couldn't sleep," their father Vundy Tha said."Even the driver, I forgive him already."Nothing can change, you know? Nothing can change. I couldn't get my kid back."The 56-year-old driver of the vehicle has not been charged by police and was taken to hospital for mandatory testing after the crash.The two children died after they were struck walking with their mother Sok Ram about 3:15pm at Joseph and Gilbert Street, Cabramatta, on Wednesday."I'm not angry to the driver," Ms Ram said."I can't believe it."The pair were treated on the scene by NSW Ambulance paramedics but died in hospital a short time later.Ms Ram recalled how they were hit by the car "walking from school"."Why my kid die? Why, please, I hope it hit me, not my baby," she said while being comforted by loved ones.Mr Tha said the couple's daughter Katherine was "smart" and was due to get an award at school on Friday.He praised the efforts of several bystanders who he said lifted the car up to try and save his son and daughter."Thank you for everyone, I wasn't here, only one word for them: Appreciate them, thank you."Unfortunately I couldn't be there, they couldn't be saved."- ABC