For the success of the 10-day training it is important to follow a few rules. 1. Avoid sound from speakers such as TV, computer, radio, shopping centers, etc, because they may reduce the success of the training. 2. During the training there should not rotate the children, omit the rotating movements (circle, roundabout). 3. The typically extreme infra or ultrasound ambient noises and devices (metro, tram, some buses) should be minimized. The surrounding noise and sound stimuli should be reduced as much as possible for the 10-day period.