The project Mensa for Kids, a cooperation between the federal state of Baden-Wuerttemberg and local student unions, offers children of graduates free meals in canteens when accompanied by their parent. This offer is available until the children are aged 10.
You only need to apply for the free 'Mensa for Kids' ID to benefit from this offer. To get the ID, you will need your student ID and a copy of your child's birth certificate or the family register.
In Heidelberg, you can get the IDs in InfoCafé International (INF 304) and in ServiceCenter at the University square.
In Heilbronn and Künzelsau, the IDs are available at from the canteen management.