This qualitative phenomenological study interviewed seven mothers to overweight children and six mothers to non-overweight children aged 7 to 9 years old about their views and experiences with preventing and managing overweight in their children. The essence was that the mothers felt responsible for their children's habits, including those leading to overweight. They also felt that competent and had the opportunity to take preventive measures against child overweight but they did not always have the energy to do so. Even resourceful mothers required support from nurses and health professionals. Our results contribute to better understanding how to approach, motivate and support mothers to draw on their own competencies to benefit their children's weight and health.