I will be traveling with my 15 year old daughter in February, 2014. I will be flying in to Zurich and then taking the train to Interlaken. I was told I could buy the Swiss Half Fare Card at the train station for 120 swiss francs that would allow me to travel for half price from Zurich to Interlaken, and along with the free Family Card, that my daughter could travel free. I was also told that I could use the Half Fare card to get half off of the train to the top of the Jungfrau and that I could buy a Junior Card for my daughter for 30 swiss francs and that my daughter could go free. Has anyone done this? I got conflicting information when I called Jungfrau railways and then called SBB. Would appreciate any info.