Attention Deficit Hyperactivity Disorder (ADHD) is behavioral, usually detected from the age of 7, with a chronic nature, presenting difficulties of sustained attention, working memory, inhibition and self-regulation processes, cognitive flexibility, among others, interfering not only in academic performance but causing self-esteem problems, depression and anxiety in the child or adolescent. A support application was developed in the treatment of children with ADHD that integrate occupational and multisensory activities to stimulate their cognitive-behavioral development. It was implemented by applying an evolutionary development model, using several of the T.I. more current such as JavaScript, HTML5, CSS, PHP and MySQL. The results in children are encouraging when comparing the evaluation of their initial diagnosis before starting treatment, with those obtained after ten months of using the application. It was possible to capture and focus the children's attention, favoring memory, attention and teamwork, as well as a substantial improvement in their mood, motivation, relaxation and behavior.