I have tried finding an answer in the forums for this topic but haven 't had any luck. We are travelling with our three children (they will be 7, 10, and 12) in the summer. When I buy train tickets from Amsterdam to Cologne, which site is the best to use? I have entered fake dates into both the bahn.de site and the nshispeed sites in order to check prices, but I am confused about the children and the cost for them. I know in the Netherlands the younger ones can ride with a railrunner (which I can't find a place to purchase in advance yet either). In Germany they are free as they will be travelling with us, their parents.
If we are starting in the Netherlands do we have to pay for the children or will they be free since we are ending our journey in Germany? I want to buy the tickets in advance so that we can get the best deal, but I don't want to be stuck with the wrong tickets once we are on board the train with all five of us. The Cologne-Berlin leg will be fine as it departs and ends in the same country. Then we will have the opposite situation for the Berlin to Copenhagen stretch (free in Germany but not in Denmark).
Any ideas/hints would be greatly appreciated!