Let's train the function of the brain happily using "Kids' Brain Balancer for iPad". The cognitive functions of children can be checked and trained using this software. - The tasks are classified into the three following functions. "Attention", "Linguistic", and "Spatial cognition". - "Developmental age" and "Developmental index" are calculated by each task. - The difficulty of each task can be adjusted. - All the subjects of all the tasks are read out with a sound. - Since data are displayed in the graphs and the tables, the present states and transitions of the results can be grasped.