On day 1, parents will be requested to complete well validated and standardised questionnaires. Baseline recording of the brain activity EEG(Electroencephalogram) will be measured and the baseline cognitive assessments will be completed on the participants. tCDS will be administered for 20 minutes alongside a simultaneous training task for working memory. Days 2, the tDCS (active or sham) will be delivered simultaneous with the training task for 20 minutes. On day 3, the tDCS intervention will be delivered followed by repeating the outcome measures similar to day 1.