To drive an electric scooter such as the 'U3 (25 km/h, 350 W)' model, general regulations require the driver to be at least 16 years old to use it legally in many countries. However, regulations may vary depending on the region or country. In Switzerland, for example, an M-category licence may be required for vehicles up to the age of 16, but there is no specific information on the minimum age for this model. Therefore, a 14-year-old may not be eligible to drive this scooter under general regulations. It is important to check local laws for more details.