CoTras-C is a cognitive rehabilitation training stsem for children. It helps to activate the brain and enhance cognitive development for children with cognitive impairment, autism, and ADHD (Attention Deficit / Hyperactivity Disorder). It is composed of 28 content of training that are suitable for children, and each training is designed to give a stimulus to them according to difficulty levels and cognitive abilities by stages. Using the results of training, it will generate customized training program for each patient by analyzing their patterns used.