My parents are visiting me in Switzerland and will have my brother’s kids (all under 15) this summer - they are all non-EU/non-Swiss. My parents will buy a tourists Swiss pass and as a resident, I will travel using my Swiss Pass. As they are not our direct children what options do we have for their travel? It seems we are not eligible for the Swiss Family Pass, but can tourists get the Children co-travelcard? Or can I add all three on my Swiss pass?