Thanks for the reply. So to get my understanding right,
1) The junior card is also applicable for tourists?
2) The card membership will be physically issued at the counter?
3) For documentation, I can bring the parent and children passports to purchase? However, the passport details doesn’t show the relationship between parents and children. but the surname of the father and children is the same.
Separate question: Can I get the junior travel card upon landing at Geneva airport? Is there a service counter there?