How does it work getting FP+ when not all your group wants to meet Anna & Elsa, but everyone wants to watch? Our 2 girls (6 and 2) want to meet them, but not our boys. DH and I both want to be there to watch/take pics, but not actually meet them either. How many FP+ do we need to get and how does that work? Can our 2 year old meet them too? Thanks!