Hello，
Im with my small family group(4 adults & 1 9-year old child) going to visit Switzerland.
So i was planning to buy 4 swiss half fare cards, and as far as i know, the child can travel free with the The Swiss Family Card.
But when i purchased the half fare cards, i cannot add my child as a co-passenger, in this case, i only bought 4 half fare cards for adults.
How can i apply this swiss family card for my child?