Hi, We (me, my husband, and our 12 yo) plan to go to Paris in June. My husband and I will buy museum passes in advance. Since kid's admission is free, do we need to wait in line at the site ticket office for the kid's free pass? It happened to us in Istanbul last year. We bought the tickets on-line in advance, but the guard made us to wait in the long line to get the kid's free pass at the ticketing booth. It was totally meaningless to purchase the passes in advance.
Thanks for your time!