A method and a device for maintaining mind concentration, is presented here. This device is intended for ADD children and students, and for people that are apt to fall asleep unintentionally while doing their task. The device is mainly composed of a microcontroller, batteries and few switches. The microcontroller provides a digital timer, and it generates a sequence of sets of signals at the end of a given time interval. Those are sent via a wire to the micro motor which is housed in a wrist belt that is situated on the user hand. As the motor is actuated it vibrates and shakes gently the user hand； Those stop daydreams, and irrelevant thoughts, if any, while they do not disturb attention or concentration, on behalf, of the special compact structure.
