 Cogmed working memory training CogMed RoboMemo,Cognitive Medical Systems AB, Stockholm version for children will be used in this program. Twelve exercises target verbal and visio-spatial working memory. Difficulty is adjusted depending on participant performances The program PRESCO Program in Cognitive Stimulation and rehabilitation comprises 40 exercises targeting: verbal and visio spatial working memory, attention capacities, reasoning, executive functioning , language and mental imagery. Only exercises targeting verbal, visual spatial working memory, and attentional capacities altered in ADHD are used in this present study. Difficulty is adjusted depending on the participant performances. 