Randomization and Blinding. Randomization will occur in permuted blocks of 2 to ensure even distribution within sites. Concealment of randomization will be achieved using online methods. After turning on tDCS, those randomized to sham will have their machine automatically ramp down after 30 seconds while those randomized to active treatment will remain at 1.0mA. All subjects will experience the same sensations and such shaming has been proven effective, including in children131. Treating therapists, outcome assessors, parents and children are blinded to treatment allocation. Following day 1 and day 10 tDCS session, participants will be asked first to guess which treatment they received: real, sham or no idea and why. If they choose no idea, they will then be asked to choose only between real and sham and give their reasons why.