1. A method for stimulation of a brain region, the method comprising: providing a first coil having a first coil base portion for delivering current to the brain region, the first coil base portion positionable on a skull; and a first coil return portion for carrying returning current, the first coil return portion at a distance from the first coil base portion; providing a second coil having a second coil base portion for delivering current to the brain region, the second coil base portion positionable on a skull; placing said first coil on the skull of a subject, such that said first coil base portion is in contact with the skull; placing said second coil on the skull of a subject, such that said second coil base portion is in contact with the skull; providing a first pulse to said first coil for activating said first coil at a level which is sub-threshold for stimulation of the brain region; and providing a second pulse to said second coil for activating said second coil at a level which is sub-threshold for stimulation of the brain region, wherein said providing a second pulse to said second coil is done with an interval of at least 1 microsecond and less than 1 millisecond after an end of said provided first pulse, so as to provide a summed effect in order to stimulate the brain region.