Just seen something I didn´t know before. It is valid for groups of up to 5 persons OR parents/grandparents (maximum 2 adults) with UNLIMITED number of own /grandchildren under 15. Gets better and better.
If we have 3 adults, and 3 children (2, 3, and 5), we cannot travel together with only 1 Bayern Ticket, am I right?
The group consists of my family (2 adults 1 child) and my sister and her 2 children.