Munich seeking for school heroes
Most children walk alone for the first time when they go to school. For this reason, primary school children were encouraged to come to school in an environmentally friendly and healthy manner within the "school hero" competition. During the two-week campaign period, they were allowed to put every day a sticker onto a poster depicting a bare tree. A green sticker if they had come to school on foot or by scooter, a yellow one for the use of bus, train or tram and a red one if their parents had brought them by car.